18937434 has 8 divisors (see below), whose sum is σ = 37874880. Its totient is φ = 6312476.

The previous prime is 18937427. The next prime is 18937463. The reversal of 18937434 is 43473981.

It is a sphenic number, since it is the product of 3 distinct primes.

18937434 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18937392 and 18937401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578114 + ... + 1578125.

It is an arithmetic number, because the mean of its divisors is an integer number (4734360).

Almost surely, 2^18937434 is an apocalyptic number.

18937434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18937434 is a wasteful number, since it uses less digits than its factorization.

18937434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156244.

The product of its digits is 72576, while the sum is 39.

The square root of 18937434 is about 4351.7162131738. The cubic root of 18937434 is about 266.5469459118.

The spelling of 18937434 in words is "eighteen million, nine hundred thirty-seven thousand, four hundred thirty-four".