18947896 has 16 divisors (see below), whose sum is σ = 38757240. Its totient is φ = 8612640.

The previous prime is 18947879. The next prime is 18947897. The reversal of 18947896 is 69874981.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18947897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107571 + ... + 107746.

Almost surely, 2^18947896 is an apocalyptic number.

It is an amenable number.

18947896 is an abundant number, since it is smaller than the sum of its proper divisors (19809344).

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

18947896 is a wasteful number, since it uses less digits than its factorization.

18947896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215334 (or 215330 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 18947896 is about 4352.9181016876. The cubic root of 18947896 is about 266.5960215642.

The spelling of 18947896 in words is "eighteen million, nine hundred forty-seven thousand, eight hundred ninety-six".