20810754913 has 32 divisors (see below), whose sum is σ = 23743399680. Its totient is φ = 18095996160.

The previous prime is 20810754859. The next prime is 20810754917. The reversal of 20810754913 is 31945701802.

It is a cyclic number.

It is not a de Polignac number, because 20810754913 - 2²¹ = 20808657761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20810754917) 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, 5636398 + ... + 5640088.

It is an arithmetic number, because the mean of its divisors is an integer number (741981240).

Almost surely, 2^20810754913 is an apocalyptic number.

20810754913 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20810754913 is a deficient number, since it is larger than the sum of its proper divisors (2932644767).

20810754913 is a wasteful number, since it uses less digits than its factorization.

20810754913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 20810754913 in words is "twenty billion, eight hundred ten million, seven hundred fifty-four thousand, nine hundred thirteen".