21867197907732 has 48 divisors (see below), whose sum is σ = 51249747924480. Its totient is φ = 7256741275872.

The previous prime is 21867197907713. The next prime is 21867197907739. The reversal of 21867197907732 is 23770979176812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21867197907739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111419793 + ... + 111615879.

It is an arithmetic number, because the mean of its divisors is an integer number (1067703081760).

Almost surely, 2^{21867197907732} is an apocalyptic number.

It is an amenable number.

21867197907732 is an abundant number, since it is smaller than the sum of its proper divisors (29382550016748).

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

21867197907732 is a wasteful number, since it uses less digits than its factorization.

21867197907732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237260 (or 237258 counting only the distinct ones).

The product of its (nonzero) digits is 112021056, while the sum is 69.

The spelling of 21867197907732 in words is "twenty-one trillion, eight hundred sixty-seven billion, one hundred ninety-seven million, nine hundred seven thousand, seven hundred thirty-two".