21032989600 has 72 divisors (see below), whose sum is σ = 58682056608. Its totient is φ = 7211308800.

The previous prime is 21032989583. The next prime is 21032989609. The reversal of 21032989600 is 698923012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (21032989609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1872346 + ... + 1883545.

It is an arithmetic number, because the mean of its divisors is an integer number (815028564).

Almost surely, 2^21032989600 is an apocalyptic number.

21032989600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21032989600 is an abundant number, since it is smaller than the sum of its proper divisors (37649067008).

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

21032989600 is a wasteful number, since it uses less digits than its factorization.

21032989600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755918 (or 3755905 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 21032989600 in words is "twenty-one billion, thirty-two million, nine hundred eighty-nine thousand, six hundred".