18890870 has 8 divisors (see below), whose sum is σ = 34003584. Its totient is φ = 7556344.

The previous prime is 18890819. The next prime is 18890881. The reversal of 18890870 is 7809881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944534 + ... + 944553.

It is an arithmetic number, because the mean of its divisors is an integer number (4250448).

Almost surely, 2^18890870 is an apocalyptic number.

18890870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18890870 is a deficient number, since it is larger than the sum of its proper divisors (15112714).

18890870 is a wasteful number, since it uses less digits than its factorization.

18890870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889094.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 18890870 is about 4346.3628472552. The cubic root of 18890870 is about 266.3283017438.

The spelling of 18890870 in words is "eighteen million, eight hundred ninety thousand, eight hundred seventy".