18872070 has 32 divisors (see below), whose sum is σ = 51763968. Its totient is φ = 4313568.

The previous prime is 18872059. The next prime is 18872071. The reversal of 18872070 is 7027881.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44724 + ... + 45143.

It is an arithmetic number, because the mean of its divisors is an integer number (1617624).

Almost surely, 2^18872070 is an apocalyptic number.

18872070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18872070 is an abundant number, since it is smaller than the sum of its proper divisors (32891898).

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

18872070 is a wasteful number, since it uses less digits than its factorization.

18872070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89884.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 18872070 is about 4344.1995810506. The cubic root of 18872070 is about 266.2399233551.

The spelling of 18872070 in words is "eighteen million, eight hundred seventy-two thousand, seventy".