20122395840 has 140 divisors (see below), whose sum is σ = 71578994256. Its totient is φ = 5365965312.

The previous prime is 20122395829. The next prime is 20122395847. The reversal of 20122395840 is 4859322102.

It is a happy number.

20122395840 is a `hidden beast` number, since 20 + 1 + 22 + 39 + 584 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20122395795 and 20122395804.

It is not an unprimeable number, because it can be changed into a prime (20122395847) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 362244 + ... + 414083.

Almost surely, 2^20122395840 is an apocalyptic number.

20122395840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122395840 is an abundant number, since it is smaller than the sum of its proper divisors (51456598416).

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

20122395840 is an equidigital number, since it uses as much as digits as its factorization.

20122395840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776356 (or 776337 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 20122395840 in words is "twenty billion, one hundred twenty-two million, three hundred ninety-five thousand, eight hundred forty".