2120955890 has 16 divisors (see below), whose sum is σ = 3949366680. Its totient is φ = 819127680.

The previous prime is 2120955841. The next prime is 2120955901. The reversal of 2120955890 is 985590212.

It can be written as a sum of positive squares in 4 ways, for example, as 2108921929 + 12033961 = 45923^2 + 3469^2 .

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, 3656531 + ... + 3657110.

Almost surely, 2^2120955890 is an apocalyptic number.

2120955890 is a deficient number, since it is larger than the sum of its proper divisors (1828410790).

2120955890 is a wasteful number, since it uses less digits than its factorization.

2120955890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7313677.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 2120955890 is about 46053.8368651299. The cubic root of 2120955890 is about 1284.8247052033.

The spelling of 2120955890 in words is "two billion, one hundred twenty million, nine hundred fifty-five thousand, eight hundred ninety".