18977484 has 48 divisors (see below), whose sum is σ = 47819520. Its totient is φ = 5839680.

The previous prime is 18977473. The next prime is 18977509. The reversal of 18977484 is 48477981.

18977484 = 17⁴ + 18⁴ + ... + 39⁴.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6819 + ... + 9189.

It is an arithmetic number, because the mean of its divisors is an integer number (996240).

Almost surely, 2^18977484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18977484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23909760).

18977484 is an abundant number, since it is smaller than the sum of its proper divisors (28842036).

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

18977484 is a wasteful number, since it uses less digits than its factorization.

18977484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430 (or 2428 counting only the distinct ones).

The product of its digits is 451584, while the sum is 48.

The square root of 18977484 is about 4356.3154155777. The cubic root of 18977484 is about 266.7347166608.

The spelling of 18977484 in words is "eighteen million, nine hundred seventy-seven thousand, four hundred eighty-four".