21150353984 has 56 divisors (see below), whose sum is σ = 44537497920. Its totient is φ = 9943898624.

The previous prime is 21150353981. The next prime is 21150354023. The reversal of 21150353984 is 48935305112.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21150353981) 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, 34919 + ... + 208614.

Almost surely, 2^21150353984 is an apocalyptic number.

It is an amenable number.

21150353984 is an abundant number, since it is smaller than the sum of its proper divisors (23387143936).

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

21150353984 is a wasteful number, since it uses less digits than its factorization.

21150353984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243627 (or 243617 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 21150353984 in words is "twenty-one billion, one hundred fifty million, three hundred fifty-three thousand, nine hundred eighty-four".