18989506570 has 16 divisors (see below), whose sum is σ = 34196968008. Its totient is φ = 7592279040.

The previous prime is 18989506517. The next prime is 18989506649. The reversal of 18989506570 is 7560598981.

It can be written as a sum of positive squares in 4 ways, for example, as 9981408649 + 9008097921 = 99907^2 + 94911^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417759 + ... + 460978.

Almost surely, 2^18989506570 is an apocalyptic number.

18989506570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18989506570 is a deficient number, since it is larger than the sum of its proper divisors (15207461438).

18989506570 is a wasteful number, since it uses less digits than its factorization.

18989506570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880905.

The product of its (nonzero) digits is 5443200, while the sum is 58.

The spelling of 18989506570 in words is "eighteen billion, nine hundred eighty-nine million, five hundred six thousand, five hundred seventy".