1818774492 has 12 divisors (see below), whose sum is σ = 4243807176. Its totient is φ = 606258160.

The previous prime is 1818774481. The next prime is 1818774523. The reversal of 1818774492 is 2944778181.

1818774492 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent 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, 75782259 + ... + 75782282.

It is an arithmetic number, because the mean of its divisors is an integer number (353650598).

Almost surely, 2^1818774492 is an apocalyptic number.

1818774492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1818774492 is an abundant number, since it is smaller than the sum of its proper divisors (2425032684).

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

1818774492 is a wasteful number, since it uses less digits than its factorization.

1818774492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151564548 (or 151564546 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 1818774492 is about 42647.0924214066. The cubic root of 1818774492 is about 1220.6550482075.

The spelling of 1818774492 in words is "one billion, eight hundred eighteen million, seven hundred seventy-four thousand, four hundred ninety-two".