18929227122 has 112 divisors (see below), whose sum is σ = 46625806080. Its totient is φ = 5725321056.

The previous prime is 18929227081. The next prime is 18929227183. The reversal of 18929227122 is 22172292981.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1109823 + ... + 1126749.

It is an arithmetic number, because the mean of its divisors is an integer number (416301840).

Almost surely, 2^18929227122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18929227122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23312903040).

18929227122 is an abundant number, since it is smaller than the sum of its proper divisors (27696578958).

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

18929227122 is a wasteful number, since it uses less digits than its factorization.

18929227122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17019 (or 17004 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

It can be divided in two parts, 18929 and 227122, that added together give a triangular number (246051 = T₇₀₁).

The spelling of 18929227122 in words is "eighteen billion, nine hundred twenty-nine million, two hundred twenty-seven thousand, one hundred twenty-two".