18070920 has 192 divisors, whose sum is σ = 68739840. Its totient is φ = 4032000.

The previous prime is 18070891. The next prime is 18070963. The reversal of 18070920 is 2907081.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178870 + ... + 178970.

It is an arithmetic number, because the mean of its divisors is an integer number (358020).

Almost surely, 2^18070920 is an apocalyptic number.

18070920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18070920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34369920).

18070920 is an abundant number, since it is smaller than the sum of its proper divisors (50668920).

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

18070920 is a wasteful number, since it uses less digits than its factorization.

18070920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 189 counting only the distinct ones).

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

The square root of 18070920 is about 4250.9904728192. The cubic root of 18070920 is about 262.4178790737.

The spelling of 18070920 in words is "eighteen million, seventy thousand, nine hundred twenty".