18980451 has 24 divisors (see below), whose sum is σ = 32697600. Its totient is φ = 10373616.

The previous prime is 18980441. The next prime is 18980473. The reversal of 18980451 is 15408981.

It is not a de Polignac number, because 18980451 - 2⁶ = 18980387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18980431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5101 + ... + 7998.

It is an arithmetic number, because the mean of its divisors is an integer number (1362400).

Almost surely, 2^18980451 is an apocalyptic number.

18980451 is a deficient number, since it is larger than the sum of its proper divisors (13717149).

18980451 is a wasteful number, since it uses less digits than its factorization.

18980451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13135 (or 13132 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18980451 is about 4356.6559423484. The cubic root of 18980451 is about 266.7486166534.

The spelling of 18980451 in words is "eighteen million, nine hundred eighty thousand, four hundred fifty-one".