18067980 has 48 divisors (see below), whose sum is σ = 57818880. Its totient is φ = 4129728.

The previous prime is 18067969. The next prime is 18067981. The reversal of 18067980 is 8976081.

It is not an unprimeable number, because it can be changed into a prime (18067981) 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, 21090 + ... + 21929.

It is an arithmetic number, because the mean of its divisors is an integer number (1204560).

Almost surely, 2^18067980 is an apocalyptic number.

18067980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18067980 is an abundant number, since it is smaller than the sum of its proper divisors (39750900).

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

18067980 is a wasteful number, since it uses less digits than its factorization.

18067980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43038 (or 43036 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 18067980 is about 4250.6446569903. The cubic root of 18067980 is about 262.4036471769.

The spelling of 18067980 in words is "eighteen million, sixty-seven thousand, nine hundred eighty".