18902070 has 96 divisors (see below), whose sum is σ = 54666144. Its totient is φ = 4492800.

The previous prime is 18902053. The next prime is 18902071. The reversal of 18902070 is 7020981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18902071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60234 + ... + 60546.

It is an arithmetic number, because the mean of its divisors is an integer number (569439).

Almost surely, 2^18902070 is an apocalyptic number.

18902070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18902070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27333072).

18902070 is an abundant number, since it is smaller than the sum of its proper divisors (35764074).

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

18902070 is a wasteful number, since it uses less digits than its factorization.

18902070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 18902070 is about 4347.6510899565. The cubic root of 18902070 is about 266.3809248307.

The spelling of 18902070 in words is "eighteen million, nine hundred two thousand, seventy".