2149203994 has 24 divisors (see below), whose sum is σ = 3759848820. Its totient is φ = 918703296.

The previous prime is 2149203977. The next prime is 2149204003. The reversal of 2149203994 is 4993029412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1720175625 + 429028369 = 41475^2 + 20713^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2149203994.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9934 + ... + 66310.

Almost surely, 2^2149203994 is an apocalyptic number.

2149203994 is a deficient number, since it is larger than the sum of its proper divisors (1610644826).

2149203994 is a wasteful number, since it uses less digits than its factorization.

2149203994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56782 (or 56775 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 2149203994 is about 46359.5081294010. The cubic root of 2149203994 is about 1290.5035780053.

The spelling of 2149203994 in words is "two billion, one hundred forty-nine million, two hundred three thousand, nine hundred ninety-four".