19274864 has 20 divisors (see below), whose sum is σ = 42680304. Its totient is φ = 8260608.

The previous prime is 19274863. The next prime is 19274903. The reversal of 19274864 is 46847291.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19274861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85937 + ... + 86160.

Almost surely, 2^19274864 is an apocalyptic number.

19274864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19274864 is an abundant number, since it is smaller than the sum of its proper divisors (23405440).

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

19274864 is a wasteful number, since it uses less digits than its factorization.

19274864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172112 (or 172106 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 19274864 is about 4390.3147950916. The cubic root of 19274864 is about 268.1207594195.

The spelling of 19274864 in words is "nineteen million, two hundred seventy-four thousand, eight hundred sixty-four".