18986745 has 16 divisors (see below), whose sum is σ = 30470400. Its totient is φ = 10095744.

The previous prime is 18986699. The next prime is 18986767. The reversal of 18986745 is 54768981.

It is not a de Polignac number, because 18986745 - 2¹⁰ = 18985721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18986694 and 18986703.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3781 + ... + 7229.

It is an arithmetic number, because the mean of its divisors is an integer number (1904400).

Almost surely, 2^18986745 is an apocalyptic number.

18986745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18986745 is a deficient number, since it is larger than the sum of its proper divisors (11483655).

18986745 is a wasteful number, since it uses less digits than its factorization.

18986745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824.

The product of its digits is 483840, while the sum is 48.

The square root of 18986745 is about 4357.3782254929. The cubic root of 18986745 is about 266.7780983949.

The spelling of 18986745 in words is "eighteen million, nine hundred eighty-six thousand, seven hundred forty-five".