53120821923 has 32 divisors (see below), whose sum is σ = 86818294080. Its totient is φ = 31892417280.

The previous prime is 53120821921. The next prime is 53120821939. The reversal of 53120821923 is 32912802135.

53120821923 is a `hidden beast` number, since 531 + 20 + 82 + 1 + 9 + 23 = 666.

It is not a de Polignac number, because 53120821923 - 2¹ = 53120821921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53120821921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1831236 + ... + 1860017.

It is an arithmetic number, because the mean of its divisors is an integer number (2713071690).

Almost surely, 2^53120821923 is an apocalyptic number.

53120821923 is a deficient number, since it is larger than the sum of its proper divisors (33697472157).

53120821923 is a wasteful number, since it uses less digits than its factorization.

53120821923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691316 (or 3691310 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 53120821923 in words is "fifty-three billion, one hundred twenty million, eight hundred twenty-one thousand, nine hundred twenty-three".