18900983 has 2 divisors, whose sum is σ = 18900984. Its totient is φ = 18900982.

The previous prime is 18900971. The next prime is 18900997. The reversal of 18900983 is 38900981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18900983 - 2⁴ = 18900967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18900943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9450491 + 9450492.

It is an arithmetic number, because the mean of its divisors is an integer number (9450492).

Almost surely, 2^18900983 is an apocalyptic number.

18900983 is a deficient number, since it is larger than the sum of its proper divisors (1).

18900983 is an equidigital number, since it uses as much as digits as its factorization.

18900983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 18900983 is about 4347.5260781277. The cubic root of 18900983 is about 266.3758184831.

The spelling of 18900983 in words is "eighteen million, nine hundred thousand, nine hundred eighty-three".