21370515052 has 12 divisors (see below), whose sum is σ = 37622345040. Its totient is φ = 10621273616.

The previous prime is 21370514987. The next prime is 21370515079. The reversal of 21370515052 is 25051507312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15995227 + ... + 15996562.

It is an arithmetic number, because the mean of its divisors is an integer number (3135195420).

Almost surely, 2^21370515052 is an apocalyptic number.

It is an amenable number.

21370515052 is a deficient number, since it is larger than the sum of its proper divisors (16251829988).

21370515052 is a wasteful number, since it uses less digits than its factorization.

21370515052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31991960 (or 31991958 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 31.

It can be divided in two parts, 21 and 370515052, that added together give a palindrome (370515073).

The spelling of 21370515052 in words is "twenty-one billion, three hundred seventy million, five hundred fifteen thousand, fifty-two".