18774748722 has 8 divisors (see below), whose sum is σ = 37549497456. Its totient is φ = 6258249572.

The previous prime is 18774748703. The next prime is 18774748739. The reversal of 18774748722 is 22784747781.

It is a happy number.

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

18774748722 is an admirable 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, 1564562388 + ... + 1564562399.

It is an arithmetic number, because the mean of its divisors is an integer number (4693687182).

Almost surely, 2^18774748722 is an apocalyptic number.

18774748722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18774748722 is a wasteful number, since it uses less digits than its factorization.

18774748722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129124792.

The product of its digits is 9834496, while the sum is 57.

The spelling of 18774748722 in words is "eighteen billion, seven hundred seventy-four million, seven hundred forty-eight thousand, seven hundred twenty-two".