18550940 has 24 divisors (see below), whose sum is σ = 39243120. Its totient is φ = 7365888.

The previous prime is 18550937. The next prime is 18550969. The reversal of 18550940 is 4905581.

It is a junction number, because it is equal to n+sod(n) for n = 18550897 and 18550906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557 + ... + 6116.

It is an arithmetic number, because the mean of its divisors is an integer number (1635130).

Almost surely, 2^18550940 is an apocalyptic number.

18550940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18550940 is an abundant number, since it is smaller than the sum of its proper divisors (20692180).

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

18550940 is a wasteful number, since it uses less digits than its factorization.

18550940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821 (or 6819 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 18550940 is about 4307.0802175023. The cubic root of 18550940 is about 264.7211496592.

The spelling of 18550940 in words is "eighteen million, five hundred fifty thousand, nine hundred forty".