18925040 has 20 divisors (see below), whose sum is σ = 44000904. Its totient is φ = 7569984.

The previous prime is 18925037. The next prime is 18925087. The reversal of 18925040 is 4052981.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 18924994 and 18925012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118202 + ... + 118361.

Almost surely, 2^18925040 is an apocalyptic number.

18925040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18925040 is an abundant number, since it is smaller than the sum of its proper divisors (25075864).

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

18925040 is a wasteful number, since it uses less digits than its factorization.

18925040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236576 (or 236570 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18925040 is about 4350.2919442263. The cubic root of 18925040 is about 266.4887841459.

The spelling of 18925040 in words is "eighteen million, nine hundred twenty-five thousand, forty".