2142138904 has 16 divisors (see below), whose sum is σ = 4025583720. Its totient is φ = 1068649920.

The previous prime is 2142138871. The next prime is 2142138913. The reversal of 2142138904 is 4098312412.

It is a self number, because there is not a number n which added to its sum of digits gives 2142138904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298677 + ... + 305764.

Almost surely, 2^2142138904 is an apocalyptic number.

It is an amenable number.

2142138904 is a deficient number, since it is larger than the sum of its proper divisors (1883444816).

2142138904 is a wasteful number, since it uses less digits than its factorization.

2142138904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604890 (or 604886 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 2142138904 is about 46283.2464721307. The cubic root of 2142138904 is about 1289.0879325026.

The spelling of 2142138904 in words is "two billion, one hundred forty-two million, one hundred thirty-eight thousand, nine hundred four".