18704961 has 12 divisors (see below), whose sum is σ = 29474640. Its totient is φ = 11336280.

The previous prime is 18704929. The next prime is 18704989. The reversal of 18704961 is 16940781.

It is not a de Polignac number, because 18704961 - 2⁵ = 18704929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18704921) 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 11 ways as a sum of consecutive naturals, for example, 94371 + ... + 94568.

It is an arithmetic number, because the mean of its divisors is an integer number (2456220).

Almost surely, 2^18704961 is an apocalyptic number.

18704961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18704961 is a deficient number, since it is larger than the sum of its proper divisors (10769679).

18704961 is a wasteful number, since it uses less digits than its factorization.

18704961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188956 (or 188953 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18704961 is about 4324.9232363130. The cubic root of 18704961 is about 265.4517558398.

The spelling of 18704961 in words is "eighteen million, seven hundred four thousand, nine hundred sixty-one".