21046245231 has 24 divisors (see below), whose sum is σ = 31017047040. Its totient is φ = 12684002320.

The previous prime is 21046245167. The next prime is 21046245257. The reversal of 21046245231 is 13254264012.

It is not a de Polignac number, because 21046245231 - 2⁶ = 21046245167 is a prime.

It is a super-2 number, since 2×21046245231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21046245631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96975 + ... + 226928.

It is an arithmetic number, because the mean of its divisors is an integer number (1292376960).

Almost surely, 2^21046245231 is an apocalyptic number.

21046245231 is a deficient number, since it is larger than the sum of its proper divisors (9970801809).

21046245231 is a wasteful number, since it uses less digits than its factorization.

21046245231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324107 (or 324096 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 21046245231 in words is "twenty-one billion, forty-six million, two hundred forty-five thousand, two hundred thirty-one".