18872645 has 16 divisors (see below), whose sum is σ = 25505280. Its totient is φ = 13281600.

The previous prime is 18872641. The next prime is 18872653. The reversal of 18872645 is 54627881.

It is not a de Polignac number, because 18872645 - 2² = 18872641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872641) 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, 3830 + ... + 7239.

It is an arithmetic number, because the mean of its divisors is an integer number (1594080).

Almost surely, 2^18872645 is an apocalyptic number.

It is an amenable number.

18872645 is a deficient number, since it is larger than the sum of its proper divisors (6632635).

18872645 is a wasteful number, since it uses less digits than its factorization.

18872645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11116.

The product of its digits is 107520, while the sum is 41.

The square root of 18872645 is about 4344.2657607471. The cubic root of 18872645 is about 266.2426272875.

The spelling of 18872645 in words is "eighteen million, eight hundred seventy-two thousand, six hundred forty-five".