1817815852 has 24 divisors (see below), whose sum is σ = 3264366672. Its totient is φ = 885216000.

The previous prime is 1817815829. The next prime is 1817815891. The reversal of 1817815852 is 2585187181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89343 + ... + 107785.

It is an arithmetic number, because the mean of its divisors is an integer number (136015278).

Almost surely, 2^1817815852 is an apocalyptic number.

It is an amenable number.

1817815852 is a deficient number, since it is larger than the sum of its proper divisors (1446550820).

1817815852 is a wasteful number, since it uses less digits than its factorization.

1817815852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19089 (or 19087 counting only the distinct ones).

The product of its digits is 179200, while the sum is 46.

The square root of 1817815852 is about 42635.8517212920. The cubic root of 1817815852 is about 1220.4405494866.

The spelling of 1817815852 in words is "one billion, eight hundred seventeen million, eight hundred fifteen thousand, eight hundred fifty-two".