18696040 has 32 divisors (see below), whose sum is σ = 45891360. Its totient is φ = 6798400.

The previous prime is 18696023. The next prime is 18696049. The reversal of 18696040 is 4069681.

It is a junction number, because it is equal to n+sod(n) for n = 18695987 and 18696005.

It is not an unprimeable number, because it can be changed into a prime (18696049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20806 + ... + 21685.

It is an arithmetic number, because the mean of its divisors is an integer number (1434105).

Almost surely, 2^18696040 is an apocalyptic number.

18696040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18696040 is an abundant number, since it is smaller than the sum of its proper divisors (27195320).

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

18696040 is a wasteful number, since it uses less digits than its factorization.

18696040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42513 (or 42509 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 18696040 is about 4323.8917655279. The cubic root of 18696040 is about 265.4095482906.

The spelling of 18696040 in words is "eighteen million, six hundred ninety-six thousand, forty".