18953788934 has 8 divisors (see below), whose sum is σ = 28440777240. Its totient is φ = 9473529856.

The previous prime is 18953788901. The next prime is 18953788939. The reversal of 18953788934 is 43988735981.

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

It is a super-2 number, since 2×18953788934² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18953788939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675259 + ... + 1686534.

It is an arithmetic number, because the mean of its divisors is an integer number (3555097155).

Almost surely, 2^18953788934 is an apocalyptic number.

18953788934 is a deficient number, since it is larger than the sum of its proper divisors (9486988306).

18953788934 is a wasteful number, since it uses less digits than its factorization.

18953788934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364614.

The product of its digits is 52254720, while the sum is 65.

The spelling of 18953788934 in words is "eighteen billion, nine hundred fifty-three million, seven hundred eighty-eight thousand, nine hundred thirty-four".