21700733231 has 8 divisors (see below), whose sum is σ = 21896768880. Its totient is φ = 21504767872.

The previous prime is 21700733213. The next prime is 21700733261. The reversal of 21700733231 is 13233700712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21700733231 - 2²⁶ = 21633624367 is a prime.

It is a super-2 number, since 2×21700733231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21700733194 and 21700733203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21700733261) 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, 754625 + ... + 782853.

It is an arithmetic number, because the mean of its divisors is an integer number (2737096110).

Almost surely, 2^21700733231 is an apocalyptic number.

21700733231 is a deficient number, since it is larger than the sum of its proper divisors (196035649).

21700733231 is a wasteful number, since it uses less digits than its factorization.

21700733231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35145.

The product of its (nonzero) digits is 5292, while the sum is 29.

The spelling of 21700733231 in words is "twenty-one billion, seven hundred million, seven hundred thirty-three thousand, two hundred thirty-one".