21252015702 has 24 divisors (see below), whose sum is σ = 46049025360. Its totient is φ = 7083545040.

The previous prime is 21252015671. The next prime is 21252015767. The reversal of 21252015702 is 20751025212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356052 + ... + 411432.

It is an arithmetic number, because the mean of its divisors is an integer number (1918709390).

Almost surely, 2^21252015702 is an apocalyptic number.

21252015702 is an abundant number, since it is smaller than the sum of its proper divisors (24797009658).

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

21252015702 is a wasteful number, since it uses less digits than its factorization.

21252015702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76708 (or 76705 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The spelling of 21252015702 in words is "twenty-one billion, two hundred fifty-two million, fifteen thousand, seven hundred two".