21074734331 has 24 divisors (see below), whose sum is σ = 25905323520. Its totient is φ = 17059874832.

The previous prime is 21074734321. The next prime is 21074734337. The reversal of 21074734331 is 13343747012.

It is a de Polignac number, because none of the positive numbers 2^k-21074734331 is a prime.

It is a super-2 number, since 2×21074734331² (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 = 21074734291 and 21074734300.

It is not an unprimeable number, because it can be changed into a prime (21074734337) 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, 29321 + ... + 207386.

It is an arithmetic number, because the mean of its divisors is an integer number (1079388480).

Almost surely, 2^21074734331 is an apocalyptic number.

21074734331 is a deficient number, since it is larger than the sum of its proper divisors (4830589189).

21074734331 is a wasteful number, since it uses less digits than its factorization.

21074734331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236823 (or 236816 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 21074734331 in words is "twenty-one billion, seventy-four million, seven hundred thirty-four thousand, three hundred thirty-one".