18905701634 has 16 divisors (see below), whose sum is σ = 30051960120. Its totient is φ = 8904282240.

The previous prime is 18905701627. The next prime is 18905701681. The reversal of 18905701634 is 43610750981.

It can be written as a sum of positive squares in 4 ways, for example, as 12045721009 + 6859980625 = 109753^2 + 82825^2 .

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, 3972749 + ... + 3977504.

Almost surely, 2^18905701634 is an apocalyptic number.

18905701634 is a deficient number, since it is larger than the sum of its proper divisors (11146258486).

18905701634 is a wasteful number, since it uses less digits than its factorization.

18905701634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950325.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 18905701634 in words is "eighteen billion, nine hundred five million, seven hundred one thousand, six hundred thirty-four".