18949771122 has 16 divisors (see below), whose sum is σ = 37962820800. Its totient is φ = 6306043952.

The previous prime is 18949771121. The next prime is 18949771133. The reversal of 18949771122 is 22117794981.

It is not an unprimeable number, because it can be changed into a prime (18949771121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2632713 + ... + 2639900.

It is an arithmetic number, because the mean of its divisors is an integer number (2372676300).

Almost surely, 2^18949771122 is an apocalyptic number.

18949771122 is an abundant number, since it is smaller than the sum of its proper divisors (19013049678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18949771122 is a wasteful number, since it uses less digits than its factorization.

18949771122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273217.

The product of its digits is 508032, while the sum is 51.

The spelling of 18949771122 in words is "eighteen billion, nine hundred forty-nine million, seven hundred seventy-one thousand, one hundred twenty-two".