21342602720 has 48 divisors (see below), whose sum is σ = 53075690640. Its totient is φ = 8087721984.

The previous prime is 21342602707. The next prime is 21342602731. The reversal of 21342602720 is 2720624312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3507257 + ... + 3513336.

It is an arithmetic number, because the mean of its divisors is an integer number (1105743555).

Almost surely, 2^21342602720 is an apocalyptic number.

21342602720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21342602720 is an abundant number, since it is smaller than the sum of its proper divisors (31733087920).

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

21342602720 is a wasteful number, since it uses less digits than its factorization.

21342602720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020627 (or 7020619 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The spelling of 21342602720 in words is "twenty-one billion, three hundred forty-two million, six hundred two thousand, seven hundred twenty".