18849886634 has 8 divisors (see below), whose sum is σ = 28327095588. Its totient is φ = 9407521440.

The previous prime is 18849886621. The next prime is 18849886669. The reversal of 18849886634 is 43668894881.

It can be written as a sum of positive squares in 2 ways, for example, as 18740788609 + 109098025 = 136897^2 + 10445^2 .

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

It is a super-2 number, since 2×18849886634² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 8709587 + ... + 8711750.

Almost surely, 2^18849886634 is an apocalyptic number.

18849886634 is a deficient number, since it is larger than the sum of its proper divisors (9477208954).

18849886634 is a wasteful number, since it uses less digits than its factorization.

18849886634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17421880.

The product of its digits is 63700992, while the sum is 65.

The spelling of 18849886634 in words is "eighteen billion, eight hundred forty-nine million, eight hundred eighty-six thousand, six hundred thirty-four".