18876645 has 40 divisors (see below), whose sum is σ = 34197504. Its totient is φ = 9961056.

The previous prime is 18876631. The next prime is 18876659. The reversal of 18876645 is 54667881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18876631) and next prime (18876659).

It is not a de Polignac number, because 18876645 - 2⁹ = 18876133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18876645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 51252 + ... + 51618.

Almost surely, 2^18876645 is an apocalyptic number.

18876645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18876645 is a deficient number, since it is larger than the sum of its proper divisors (15320859).

18876645 is a wasteful number, since it uses less digits than its factorization.

18876645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 502 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 18876645 is about 4344.7261133471. The cubic root of 18876645 is about 266.2614357318.

The spelling of 18876645 in words is "eighteen million, eight hundred seventy-six thousand, six hundred forty-five".