18748961 has 16 divisors (see below), whose sum is σ = 23777280. Its totient is φ = 14358480.

The previous prime is 18748957. The next prime is 18748963. The reversal of 18748961 is 16984781.

It is a cyclic number.

It is not a de Polignac number, because 18748961 - 2² = 18748957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18748963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2480 + ... + 6606.

It is an arithmetic number, because the mean of its divisors is an integer number (1486080).

Almost surely, 2^18748961 is an apocalyptic number.

18748961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18748961 is a deficient number, since it is larger than the sum of its proper divisors (5028319).

18748961 is a wasteful number, since it uses less digits than its factorization.

18748961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204.

The product of its digits is 96768, while the sum is 44.

The square root of 18748961 is about 4330.0070438742. The cubic root of 18748961 is about 265.6597350839.

The spelling of 18748961 in words is "eighteen million, seven hundred forty-eight thousand, nine hundred sixty-one".