22712851840 has 128 divisors (see below), whose sum is σ = 64056913920. Its totient is φ = 7536015360.

The previous prime is 22712851829. The next prime is 22712851873. The reversal of 22712851840 is 4815821722.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-4 number, since 4×22712851840⁴ (a number of 43 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 22712851793 and 22712851802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57109 + ... + 220651.

It is an arithmetic number, because the mean of its divisors is an integer number (500444640).

Almost surely, 2^22712851840 is an apocalyptic number.

22712851840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22712851840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32028456960).

22712851840 is an abundant number, since it is smaller than the sum of its proper divisors (41344062080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22712851840 is a wasteful number, since it uses less digits than its factorization.

22712851840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163600 (or 163588 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The spelling of 22712851840 in words is "twenty-two billion, seven hundred twelve million, eight hundred fifty-one thousand, eight hundred forty".