18937966 has 8 divisors (see below), whose sum is σ = 30078000. Its totient is φ = 8911968.

The previous prime is 18937951. The next prime is 18937973. The reversal of 18937966 is 66973981.

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

It is a congruent number.

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, 278466 + ... + 278533.

It is an arithmetic number, because the mean of its divisors is an integer number (3759750).

Almost surely, 2^18937966 is an apocalyptic number.

18937966 is a deficient number, since it is larger than the sum of its proper divisors (11140034).

18937966 is a wasteful number, since it uses less digits than its factorization.

18937966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557018.

The product of its digits is 489888, while the sum is 49.

The square root of 18937966 is about 4351.7773380540. Note that the first 3 decimals coincide. The cubic root of 18937966 is about 266.5494418791.

The spelling of 18937966 in words is "eighteen million, nine hundred thirty-seven thousand, nine hundred sixty-six".