21697016000 has 112 divisors (see below), whose sum is σ = 58617685152. Its totient is φ = 7889792000.

The previous prime is 21697015987. The next prime is 21697016017. The reversal of 21697016000 is 61079612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35279 + ... + 211278.

Almost surely, 2^21697016000 is an apocalyptic number.

21697016000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21697016000 is an abundant number, since it is smaller than the sum of its proper divisors (36920669152).

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

21697016000 is a wasteful number, since it uses less digits than its factorization.

21697016000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246595 (or 246575 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The spelling of 21697016000 in words is "twenty-one billion, six hundred ninety-seven million, sixteen thousand".