18890132 has 6 divisors (see below), whose sum is σ = 33057738. Its totient is φ = 9445064.

The previous prime is 18890117. The next prime is 18890147. The reversal of 18890132 is 23109881.

It is an interprime number because it is at equal distance from previous prime (18890117) and next prime (18890147).

It can be written as a sum of positive squares in only one way, i.e., 14032516 + 4857616 = 3746^2 + 2204^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2361263 + ... + 2361270.

It is an arithmetic number, because the mean of its divisors is an integer number (5509623).

Almost surely, 2^18890132 is an apocalyptic number.

It is an amenable number.

18890132 is a deficient number, since it is larger than the sum of its proper divisors (14167606).

18890132 is a wasteful number, since it uses less digits than its factorization.

18890132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722537 (or 4722535 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 18890132 is about 4346.2779478538. The cubic root of 18890132 is about 266.3248335279.

The spelling of 18890132 in words is "eighteen million, eight hundred ninety thousand, one hundred thirty-two".