21899653400 has 24 divisors (see below), whose sum is σ = 50916694620. Its totient is φ = 8759861280.

The previous prime is 21899653397. The next prime is 21899653409. The reversal of 21899653400 is 435699812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21899653409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54748934 + ... + 54749333.

Almost surely, 2^21899653400 is an apocalyptic number.

21899653400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21899653400 is an abundant number, since it is smaller than the sum of its proper divisors (29017041220).

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

21899653400 is a wasteful number, since it uses less digits than its factorization.

21899653400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109498283 (or 109498274 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 21899653400 in words is "twenty-one billion, eight hundred ninety-nine million, six hundred fifty-three thousand, four hundred".