21295594080 has 72 divisors (see below), whose sum is σ = 72671219712. Its totient is φ = 5678824704.

The previous prime is 21295594063. The next prime is 21295594093. The reversal of 21295594080 is 8049559212.

It is a happy number.

21295594080 is a `hidden beast` number, since 2 + 12 + 9 + 559 + 4 + 0 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7392864 + ... + 7395743.

It is an arithmetic number, because the mean of its divisors is an integer number (1009322496).

Almost surely, 2^21295594080 is an apocalyptic number.

21295594080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21295594080 is an abundant number, since it is smaller than the sum of its proper divisors (51375625632).

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

21295594080 is a wasteful number, since it uses less digits than its factorization.

21295594080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14788628 (or 14788617 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 21295594080 in words is "twenty-one billion, two hundred ninety-five million, five hundred ninety-four thousand, eighty".