19900612 has 24 divisors (see below), whose sum is σ = 37598400. Its totient is φ = 9188256.

The previous prime is 19900607. The next prime is 19900627. The reversal of 19900612 is 21600991.

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, 1062 + ... + 6397.

It is an arithmetic number, because the mean of its divisors is an integer number (1566600).

Almost surely, 2^19900612 is an apocalyptic number.

It is an amenable number.

19900612 is a deficient number, since it is larger than the sum of its proper divisors (17697788).

19900612 is a wasteful number, since it uses less digits than its factorization.

19900612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515 (or 7513 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 19900612 is about 4461.0101994952. The cubic root of 19900612 is about 270.9913805622.

The spelling of 19900612 in words is "nineteen million, nine hundred thousand, six hundred twelve".