20013858036 has 36 divisors (see below), whose sum is σ = 50847408612. Its totient is φ = 6637419264.

The previous prime is 20013858023. The next prime is 20013858041. The reversal of 20013858036 is 63085831002.

It can be written as a sum of positive squares in 2 ways, for example, as 19493744400 + 520113636 = 139620^2 + 22806^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 1403925 + ... + 1418108.

It is an arithmetic number, because the mean of its divisors is an integer number (1412428017).

Almost surely, 2^20013858036 is an apocalyptic number.

It is an amenable number.

20013858036 is an abundant number, since it is smaller than the sum of its proper divisors (30833550576).

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

20013858036 is a wasteful number, since it uses less digits than its factorization.

20013858036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822240 (or 2822235 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 20013858036 in words is "twenty billion, thirteen million, eight hundred fifty-eight thousand, thirty-six".