18954663 has 16 divisors (see below), whose sum is σ = 31105536. Its totient is φ = 9997920.

The previous prime is 18954613. The next prime is 18954679. The reversal of 18954663 is 36645981.

It is not a de Polignac number, because 18954663 - 2⁸ = 18954407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18954613) 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, 34443 + ... + 34988.

It is an arithmetic number, because the mean of its divisors is an integer number (1944096).

Almost surely, 2^18954663 is an apocalyptic number.

18954663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18954663 is a deficient number, since it is larger than the sum of its proper divisors (12150873).

18954663 is a wasteful number, since it uses less digits than its factorization.

18954663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69454.

The product of its digits is 155520, while the sum is 42.

The square root of 18954663 is about 4353.6953269608. The cubic root of 18954663 is about 266.6277549126.

The spelling of 18954663 in words is "eighteen million, nine hundred fifty-four thousand, six hundred sixty-three".