21672347756892 has 24 divisors (see below), whose sum is σ = 57792927351936. Its totient is φ = 6192099359088.

The previous prime is 21672347756887. The next prime is 21672347756893. The reversal of 21672347756892 is 29865774327612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21672347756893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129002069898 + ... + 129002070065.

It is an arithmetic number, because the mean of its divisors is an integer number (2408038639664).

Almost surely, 2^{21672347756892} is an apocalyptic number.

It is an amenable number.

21672347756892 is an abundant number, since it is smaller than the sum of its proper divisors (36120579595044).

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

21672347756892 is a wasteful number, since it uses less digits than its factorization.

21672347756892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258004139977 (or 258004139975 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 69.

The spelling of 21672347756892 in words is "twenty-one trillion, six hundred seventy-two billion, three hundred forty-seven million, seven hundred fifty-six thousand, eight hundred ninety-two".