21679870352 has 40 divisors (see below), whose sum is σ = 50532033600. Its totient is φ = 8802352512.

The previous prime is 21679870351. The next prime is 21679870363. The reversal of 21679870352 is 25307897612.

It is a self number, because there is not a number n which added to its sum of digits gives 21679870352.

It is not an unprimeable number, because it can be changed into a prime (21679870351) 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, 5091827 + ... + 5096082.

It is an arithmetic number, because the mean of its divisors is an integer number (1263300840).

Almost surely, 2^21679870352 is an apocalyptic number.

It is an amenable number.

21679870352 is an abundant number, since it is smaller than the sum of its proper divisors (28852163248).

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

21679870352 is a wasteful number, since it uses less digits than its factorization.

21679870352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187943 (or 10187937 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 21679870352 in words is "twenty-one billion, six hundred seventy-nine million, eight hundred seventy thousand, three hundred fifty-two".