20210531135 has 16 divisors (see below), whose sum is σ = 26639055360. Its totient is φ = 14651477280.

The previous prime is 20210531123. The next prime is 20210531161. The reversal of 20210531135 is 53113501202.

It is a happy number.

It is not a de Polignac number, because 20210531135 - 2⁶ = 20210531071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 20210531135.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4622651 + ... + 4627020.

It is an arithmetic number, because the mean of its divisors is an integer number (1664940960).

Almost surely, 2^20210531135 is an apocalyptic number.

20210531135 is a deficient number, since it is larger than the sum of its proper divisors (6428524225).

20210531135 is a wasteful number, since it uses less digits than its factorization.

20210531135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9249718.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 20210531135 in words is "twenty billion, two hundred ten million, five hundred thirty-one thousand, one hundred thirty-five".