2154620636 has 24 divisors (see below), whose sum is σ = 4323026400. Its totient is φ = 920454912.

The previous prime is 2154620617. The next prime is 2154620687. The reversal of 2154620636 is 6360264512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2154620596 and 2154620605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114161 + ... + 131688.

It is an arithmetic number, because the mean of its divisors is an integer number (180126100).

Almost surely, 2^2154620636 is an apocalyptic number.

It is an amenable number.

2154620636 is an abundant number, since it is smaller than the sum of its proper divisors (2168405764).

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

2154620636 is a wasteful number, since it uses less digits than its factorization.

2154620636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246173 (or 246171 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 2154620636 is about 46417.8913351307. The cubic root of 2154620636 is about 1291.5868211724.

The spelling of 2154620636 in words is "two billion, one hundred fifty-four million, six hundred twenty thousand, six hundred thirty-six".