19776968 has 8 divisors (see below), whose sum is σ = 37081830. Its totient is φ = 9888480.

The previous prime is 19776961. The next prime is 19776973. The reversal of 19776968 is 86967791.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18472804 + 1304164 = 4298^2 + 1142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×19776968² = 782256926546048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19776961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1236053 + ... + 1236068.

Almost surely, 2^19776968 is an apocalyptic number.

It is an amenable number.

19776968 is a deficient number, since it is larger than the sum of its proper divisors (17304862).

19776968 is a wasteful number, since it uses less digits than its factorization.

19776968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472127 (or 2472123 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 53.

The square root of 19776968 is about 4447.1303106610. The cubic root of 19776968 is about 270.4289842651.

The spelling of 19776968 in words is "nineteen million, seven hundred seventy-six thousand, nine hundred sixty-eight".