19678764 has 24 divisors (see below), whose sum is σ = 52476928. Its totient is φ = 5622480.

The previous prime is 19678721. The next prime is 19678781. The reversal of 19678764 is 46787691.

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, 117052 + ... + 117219.

Almost surely, 2^19678764 is an apocalyptic number.

19678764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19678764 is an abundant number, since it is smaller than the sum of its proper divisors (32798164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19678764 is a wasteful number, since it uses less digits than its factorization.

19678764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234285 (or 234283 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 19678764 is about 4436.0752924178. The cubic root of 19678764 is about 269.9806296117.

It can be divided in two parts, 1967 and 8764, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 19678764 in words is "nineteen million, six hundred seventy-eight thousand, seven hundred sixty-four".