1820037564 has 72 divisors (see below), whose sum is σ = 4966284960. Its totient is φ = 560284032.

The previous prime is 1820037539. The next prime is 1820037577. The reversal of 1820037564 is 4657300281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13887 + ... + 61910.

It is an arithmetic number, because the mean of its divisors is an integer number (68976180).

Almost surely, 2^1820037564 is an apocalyptic number.

It is an amenable number.

1820037564 is an abundant number, since it is smaller than the sum of its proper divisors (3146247396).

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

1820037564 is a wasteful number, since it uses less digits than its factorization.

1820037564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75859 (or 75854 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1820037564 is about 42661.8982700020. The cubic root of 1820037564 is about 1220.9375495027.

The spelling of 1820037564 in words is "one billion, eight hundred twenty million, thirty-seven thousand, five hundred sixty-four".