21333164356 has 24 divisors (see below), whose sum is σ = 44911926080. Its totient is φ = 8661585312.

The previous prime is 21333164341. The next prime is 21333164371. The reversal of 21333164356 is 65346133312.

It is an interprime number because it is at equal distance from previous prime (21333164341) and next prime (21333164371).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20049435 + ... + 20050498.

Almost surely, 2^21333164356 is an apocalyptic number.

It is an amenable number.

21333164356 is an abundant number, since it is smaller than the sum of its proper divisors (23578761724).

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

21333164356 is a wasteful number, since it uses less digits than its factorization.

21333164356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40099963 (or 40099961 counting only the distinct ones).

The product of its digits is 116640, while the sum is 37.

Adding to 21333164356 its reverse (65346133312), we get a palindrome (86679297668).

The spelling of 21333164356 in words is "twenty-one billion, three hundred thirty-three million, one hundred sixty-four thousand, three hundred fifty-six".