2180020764 has 24 divisors (see below), whose sum is σ = 5137081488. Its totient is φ = 719478400.

The previous prime is 2180020763. The next prime is 2180020771. The reversal of 2180020764 is 4670200812.

It is a super-2 number, since 2×2180020764² = 9504981062942287392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180020763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 898137 + ... + 900560.

It is an arithmetic number, because the mean of its divisors is an integer number (214045062).

Almost surely, 2^2180020764 is an apocalyptic number.

It is an amenable number.

2180020764 is an abundant number, since it is smaller than the sum of its proper divisors (2957060724).

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

2180020764 is a wasteful number, since it uses less digits than its factorization.

2180020764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798805 (or 1798803 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 2180020764 is about 46690.6924771951. The cubic root of 2180020764 is about 1296.6423736884.

The spelling of 2180020764 in words is "two billion, one hundred eighty million, twenty thousand, seven hundred sixty-four".