21507532040652 has 48 divisors (see below), whose sum is σ = 59847045683712. Its totient is φ = 5877834842880.

The previous prime is 21507532040641. The next prime is 21507532040663. The reversal of 21507532040652 is 25604023570512.

It is an interprime number because it is at equal distance from previous prime (21507532040641) and next prime (21507532040663).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5566129549 + ... + 5566133412.

It is an arithmetic number, because the mean of its divisors is an integer number (1246813451744).

Almost surely, 2^{21507532040652} is an apocalyptic number.

It is an amenable number.

21507532040652 is an abundant number, since it is smaller than the sum of its proper divisors (38339513643060).

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

21507532040652 is a wasteful number, since it uses less digits than its factorization.

21507532040652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11132262998 (or 11132262996 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 42.

The spelling of 21507532040652 in words is "twenty-one trillion, five hundred seven billion, five hundred thirty-two million, forty thousand, six hundred fifty-two".