1820383506 has 24 divisors (see below), whose sum is σ = 3945037824. Its totient is φ = 606660120.

The previous prime is 1820383493. The next prime is 1820383531. The reversal of 1820383506 is 6053830281.

It is a super-2 number, since 2×1820383506² = 6627592217833704072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104815 + ... + 120941.

It is an arithmetic number, because the mean of its divisors is an integer number (164376576).

Almost surely, 2^1820383506 is an apocalyptic number.

1820383506 is an abundant number, since it is smaller than the sum of its proper divisors (2124654318).

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

1820383506 is a wasteful number, since it uses less digits than its factorization.

1820383506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22406 (or 22403 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1820383506 is about 42665.9525382945. The cubic root of 1820383506 is about 1221.0149008036.

The spelling of 1820383506 in words is "one billion, eight hundred twenty million, three hundred eighty-three thousand, five hundred six".