18954864 has 160 divisors (see below), whose sum is σ = 60264000. Its totient is φ = 5677056.

The previous prime is 18954853. The next prime is 18954883. The reversal of 18954864 is 46845981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212932 + ... + 213020.

It is an arithmetic number, because the mean of its divisors is an integer number (376650).

Almost surely, 2^18954864 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 18954864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30132000).

18954864 is an abundant number, since it is smaller than the sum of its proper divisors (41309136).

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

18954864 is a wasteful number, since it uses less digits than its factorization.

18954864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 140 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 18954864 is about 4353.7184107381. The cubic root of 18954864 is about 266.6286973718.

The spelling of 18954864 in words is "eighteen million, nine hundred fifty-four thousand, eight hundred sixty-four".