21867309762852 has 48 divisors (see below), whose sum is σ = 51111692392320. Its totient is φ = 7276546755072.

The previous prime is 21867309762817. The next prime is 21867309762967. The reversal of 21867309762852 is 25826790376812.

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, 15891058 + ... + 17212214.

It is an arithmetic number, because the mean of its divisors is an integer number (1064826924840).

Almost surely, 2^{21867309762852} is an apocalyptic number.

It is an amenable number.

21867309762852 is an abundant number, since it is smaller than the sum of its proper divisors (29244382629468).

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

21867309762852 is a wasteful number, since it uses less digits than its factorization.

21867309762852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323540 (or 1323538 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 66.

The spelling of 21867309762852 in words is "twenty-one trillion, eight hundred sixty-seven billion, three hundred nine million, seven hundred sixty-two thousand, eight hundred fifty-two".