19768738 has 12 divisors (see below), whose sum is σ = 32594310. Its totient is φ = 8985680.

The previous prime is 19768709. The next prime is 19768747. The reversal of 19768738 is 83786791.

It can be written as a sum of positive squares in only one way, i.e., 12623809 + 7144929 = 3553^2 + 2673^2 .

It is a super-2 number, since 2×19768738² = 781606004225288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19768691 and 19768700.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40603 + ... + 41086.

Almost surely, 2^19768738 is an apocalyptic number.

19768738 is a deficient number, since it is larger than the sum of its proper divisors (12825572).

19768738 is a wasteful number, since it uses less digits than its factorization.

19768738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81713 (or 81702 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The square root of 19768738 is about 4446.2048985624. The cubic root of 19768738 is about 270.3914668975.

The spelling of 19768738 in words is "nineteen million, seven hundred sixty-eight thousand, seven hundred thirty-eight".