18980940 has 48 divisors (see below), whose sum is σ = 57980160. Its totient is φ = 4601280.

The previous prime is 18980893. The next prime is 18980947. The reversal of 18980940 is 4908981.

It is not an unprimeable number, because it can be changed into a prime (18980947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13720 + ... + 15039.

It is an arithmetic number, because the mean of its divisors is an integer number (1207920).

Almost surely, 2^18980940 is an apocalyptic number.

18980940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18980940 is an abundant number, since it is smaller than the sum of its proper divisors (38999220).

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

18980940 is a wasteful number, since it uses less digits than its factorization.

18980940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28782 (or 28780 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 18980940 is about 4356.7120630127. The cubic root of 18980940 is about 266.7509074131.

The spelling of 18980940 in words is "eighteen million, nine hundred eighty thousand, nine hundred forty".