21692919800 has 48 divisors (see below), whose sum is σ = 50727657240. Its totient is φ = 8626997120.

The previous prime is 21692919779. The next prime is 21692919803. The reversal of 21692919800 is 891929612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21692919803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278882 + ... + 348081.

Almost surely, 2^21692919800 is an apocalyptic number.

21692919800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21692919800 is an abundant number, since it is smaller than the sum of its proper divisors (29034737440).

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

21692919800 is a wasteful number, since it uses less digits than its factorization.

21692919800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627152 (or 627143 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 21692919800 in words is "twenty-one billion, six hundred ninety-two million, nine hundred nineteen thousand, eight hundred".