18649368 has 24 divisors (see below), whose sum is σ = 50508900. Its totient is φ = 6216432.

The previous prime is 18649363. The next prime is 18649373. The reversal of 18649368 is 86394681.

It is an interprime number because it is at equal distance from previous prime (18649363) and next prime (18649373).

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18649361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129438 + ... + 129581.

Almost surely, 2^18649368 is an apocalyptic number.

18649368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18649368 is an abundant number, since it is smaller than the sum of its proper divisors (31859532).

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

18649368 is a wasteful number, since it uses less digits than its factorization.

18649368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259031 (or 259024 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 18649368 is about 4318.4914032565. The cubic root of 18649368 is about 265.1885118861.

The spelling of 18649368 in words is "eighteen million, six hundred forty-nine thousand, three hundred sixty-eight".