18950988 has 96 divisors (see below), whose sum is σ = 55931904. Its totient is φ = 4866048.

The previous prime is 18950963. The next prime is 18950989. The reversal of 18950988 is 88905981.

It is a super-2 number, since 2×18950988² = 718279892352288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18950989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32556 + ... + 33132.

It is an arithmetic number, because the mean of its divisors is an integer number (582624).

Almost surely, 2^18950988 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 18950988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27965952).

18950988 is an abundant number, since it is smaller than the sum of its proper divisors (36980916).

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

18950988 is a wasteful number, since it uses less digits than its factorization.

18950988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 48.

The square root of 18950988 is about 4353.2732512444. The cubic root of 18950988 is about 266.6105222079.

The spelling of 18950988 in words is "eighteen million, nine hundred fifty thousand, nine hundred eighty-eight".