1813973052 has 12 divisors (see below), whose sum is σ = 4232603816. Its totient is φ = 604657680.

The previous prime is 1813973027. The next prime is 1813973069. The reversal of 1813973052 is 2503793181.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1813973052.

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, 75582199 + ... + 75582222.

Almost surely, 2^1813973052 is an apocalyptic number.

1813973052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1813973052 is an abundant number, since it is smaller than the sum of its proper divisors (2418630764).

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

1813973052 is a wasteful number, since it uses less digits than its factorization.

1813973052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151164428 (or 151164426 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1813973052 is about 42590.7625195887. The cubic root of 1813973052 is about 1219.5799530381.

The spelling of 1813973052 in words is "one billion, eight hundred thirteen million, nine hundred seventy-three thousand, fifty-two".