22449786840 has 192 divisors, whose sum is σ = 79271468640. Its totient is φ = 5477068800.

The previous prime is 22449786829. The next prime is 22449786923. The reversal of 22449786840 is 4868794422.

It is a super-2 number, since 2×22449786840² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 507615 + ... + 550065.

Almost surely, 2^22449786840 is an apocalyptic number.

22449786840 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 22449786840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39635734320).

22449786840 is an abundant number, since it is smaller than the sum of its proper divisors (56821681800).

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

22449786840 is a wasteful number, since it uses less digits than its factorization.

22449786840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42594 (or 42587 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 22449786840 in words is "twenty-two billion, four hundred forty-nine million, seven hundred eighty-six thousand, eight hundred forty".