22978973680 has 40 divisors (see below), whose sum is σ = 57535817472. Its totient is φ = 8484543744.

The previous prime is 22978973671. The next prime is 22978973681. The reversal of 22978973680 is 8637987922.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×22978973680² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22978973681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11046544 + ... + 11048623.

Almost surely, 2^22978973680 is an apocalyptic number.

22978973680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22978973680 is an abundant number, since it is smaller than the sum of its proper divisors (34556843792).

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

22978973680 is a wasteful number, since it uses less digits than its factorization.

22978973680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22095193 (or 22095187 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 22978973680 in words is "twenty-two billion, nine hundred seventy-eight million, nine hundred seventy-three thousand, six hundred eighty".