18725369 has 12 divisors (see below), whose sum is σ = 20422800. Its totient is φ = 17160624.

The previous prime is 18725363. The next prime is 18725383. The reversal of 18725369 is 96352781.

It is not a de Polignac number, because 18725369 - 2¹² = 18721273 is a prime.

It is a super-2 number, since 2×18725369² = 701278888372322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18725363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29942 + ... + 30560.

It is an arithmetic number, because the mean of its divisors is an integer number (1701900).

Almost surely, 2^18725369 is an apocalyptic number.

It is an amenable number.

18725369 is a deficient number, since it is larger than the sum of its proper divisors (1697431).

18725369 is a wasteful number, since it uses less digits than its factorization.

18725369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 811 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 18725369 is about 4327.2819413576. The cubic root of 18725369 is about 265.5482609049.

The spelling of 18725369 in words is "eighteen million, seven hundred twenty-five thousand, three hundred sixty-nine".