20210511516 has 48 divisors (see below), whose sum is σ = 52993457664. Its totient is φ = 5948243136.

The previous prime is 20210511499. The next prime is 20210511547. The reversal of 20210511516 is 61511501202.

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, 2812816 + ... + 2819991.

It is an arithmetic number, because the mean of its divisors is an integer number (1104030368).

Almost surely, 2^20210511516 is an apocalyptic number.

20210511516 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20210511516 is an abundant number, since it is smaller than the sum of its proper divisors (32782946148).

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

20210511516 is a wasteful number, since it uses less digits than its factorization.

20210511516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5632850 (or 5632848 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The spelling of 20210511516 in words is "twenty billion, two hundred ten million, five hundred eleven thousand, five hundred sixteen".