18915952 has 40 divisors (see below), whose sum is σ = 41283072. Its totient is φ = 8318400.

The previous prime is 18915943. The next prime is 18915961. The reversal of 18915952 is 25951981.

It is an interprime number because it is at equal distance from previous prime (18915943) and next prime (18915961).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3723 + ... + 7189.

Almost surely, 2^18915952 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 18915952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20641536).

18915952 is an abundant number, since it is smaller than the sum of its proper divisors (22367120).

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

18915952 is a wasteful number, since it uses less digits than its factorization.

18915952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517 (or 3511 counting only the distinct ones).

The product of its digits is 32400, while the sum is 40.

The square root of 18915952 is about 4349.2472911988. The cubic root of 18915952 is about 266.4461204256.

The spelling of 18915952 in words is "eighteen million, nine hundred fifteen thousand, nine hundred fifty-two".