20933549231 has 48 divisors (see below), whose sum is σ = 25923240000. Its totient is φ = 16550217216.

The previous prime is 20933549227. The next prime is 20933549251. The reversal of 20933549231 is 13294533902.

It is a happy number.

It is not a de Polignac number, because 20933549231 - 2² = 20933549227 is a prime.

It is a super-2 number, since 2×20933549231² (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 (20933549201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19955195 + ... + 19956243.

It is an arithmetic number, because the mean of its divisors is an integer number (540067500).

Almost surely, 2^20933549231 is an apocalyptic number.

20933549231 is a deficient number, since it is larger than the sum of its proper divisors (4989690769).

20933549231 is a wasteful number, since it uses less digits than its factorization.

20933549231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 41.

The spelling of 20933549231 in words is "twenty billion, nine hundred thirty-three million, five hundred forty-nine thousand, two hundred thirty-one".