2021156268 has 24 divisors (see below), whose sum is σ = 4719687168. Its totient is φ = 673196496.

The previous prime is 2021156239. The next prime is 2021156273. The reversal of 2021156268 is 8626511202.

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, 48996 + ... + 80267.

It is an arithmetic number, because the mean of its divisors is an integer number (196653632).

Almost surely, 2^2021156268 is an apocalyptic number.

It is an amenable number.

2021156268 is an abundant number, since it is smaller than the sum of its proper divisors (2698530900).

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

2021156268 is a wasteful number, since it uses less digits than its factorization.

2021156268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130573 (or 130571 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 2021156268 is about 44957.2715809134. The cubic root of 2021156268 is about 1264.3480146187.

The spelling of 2021156268 in words is "two billion, twenty-one million, one hundred fifty-six thousand, two hundred sixty-eight".