21457174400 has 48 divisors (see below), whose sum is σ = 53005934040. Its totient is φ = 8582868480.

The previous prime is 21457174369. The next prime is 21457174439. The reversal of 21457174400 is 447175412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3349484 + ... + 3355883.

Almost surely, 2^21457174400 is an apocalyptic number.

21457174400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21457174400 is an abundant number, since it is smaller than the sum of its proper divisors (31548759640).

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

21457174400 is an equidigital number, since it uses as much as digits as its factorization.

21457174400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6705391 (or 6705374 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 21457174400 in words is "twenty-one billion, four hundred fifty-seven million, one hundred seventy-four thousand, four hundred".