2100636156 has 12 divisors (see below), whose sum is σ = 4901484392. Its totient is φ = 700212048.

The previous prime is 2100636151. The next prime is 2100636157. The reversal of 2100636156 is 6516360012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100636151) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 87526495 + ... + 87526518.

Almost surely, 2^2100636156 is an apocalyptic number.

It is an amenable number.

2100636156 is an abundant number, since it is smaller than the sum of its proper divisors (2800848236).

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

2100636156 is a wasteful number, since it uses less digits than its factorization.

2100636156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175053020 (or 175053018 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 2100636156 is about 45832.6974549829. The cubic root of 2100636156 is about 1280.7084611577.

Adding to 2100636156 its reverse (6516360012), we get a palindrome (8616996168).

The spelling of 2100636156 in words is "two billion, one hundred million, six hundred thirty-six thousand, one hundred fifty-six".