18914980 has 36 divisors (see below), whose sum is σ = 46208988. Its totient is φ = 6484800.

The previous prime is 18914963. The next prime is 18915007. The reversal of 18914980 is 8941981.

It can be written as a sum of positive squares in 2 ways, for example, as 8726116 + 10188864 = 2954^2 + 3192^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8671 + ... + 10630.

It is an arithmetic number, because the mean of its divisors is an integer number (1283583).

Almost surely, 2^18914980 is an apocalyptic number.

18914980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18914980 is an abundant number, since it is smaller than the sum of its proper divisors (27294008).

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

18914980 is a wasteful number, since it uses less digits than its factorization.

18914980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19324 (or 19315 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 18914980 is about 4349.1355462896. The cubic root of 18914980 is about 266.4415565516.

The spelling of 18914980 in words is "eighteen million, nine hundred fourteen thousand, nine hundred eighty".