19900768 has 24 divisors (see below), whose sum is σ = 39290832. Its totient is φ = 9922176.

The previous prime is 19900753. The next prime is 19900781. The reversal of 19900768 is 86700991.

It is a self number, because there is not a number n which added to its sum of digits gives 19900768.

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, 14946 + ... + 16222.

It is an arithmetic number, because the mean of its divisors is an integer number (1637118).

Almost surely, 2^19900768 is an apocalyptic number.

It is an amenable number.

19900768 is a deficient number, since it is larger than the sum of its proper divisors (19390064).

19900768 is a wasteful number, since it uses less digits than its factorization.

19900768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1766 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 19900768 is about 4461.0276842898. The cubic root of 19900768 is about 270.9920886567.

The spelling of 19900768 in words is "nineteen million, nine hundred thousand, seven hundred sixty-eight".