18888683434 has 8 divisors (see below), whose sum is σ = 28433855268. Its totient is φ = 9410731680.

The previous prime is 18888683431. The next prime is 18888683467. The reversal of 18888683434 is 43438688881.

It can be written as a sum of positive squares in 2 ways, for example, as 17383631409 + 1505052025 = 131847^2 + 38795^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18888683431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16804317 + ... + 16805440.

Almost surely, 2^18888683434 is an apocalyptic number.

18888683434 is a deficient number, since it is larger than the sum of its proper divisors (9545171834).

18888683434 is a wasteful number, since it uses less digits than its factorization.

18888683434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33610040.

The product of its digits is 28311552, while the sum is 61.

The spelling of 18888683434 in words is "eighteen billion, eight hundred eighty-eight million, six hundred eighty-three thousand, four hundred thirty-four".