2021613812 has 6 divisors (see below), whose sum is σ = 3537824178. Its totient is φ = 1010806904.

The previous prime is 2021613791. The next prime is 2021613823. The reversal of 2021613812 is 2183161202.

It can be written as a sum of positive squares in only one way, i.e., 1971004816 + 50608996 = 44396^2 + 7114^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252701723 + ... + 252701730.

It is an arithmetic number, because the mean of its divisors is an integer number (589637363).

Almost surely, 2^2021613812 is an apocalyptic number.

It is an amenable number.

2021613812 is a deficient number, since it is larger than the sum of its proper divisors (1516210366).

2021613812 is a wasteful number, since it uses less digits than its factorization.

2021613812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505403457 (or 505403455 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2021613812 is about 44962.3599469601. The cubic root of 2021613812 is about 1264.4434140047.

The spelling of 2021613812 in words is "two billion, twenty-one million, six hundred thirteen thousand, eight hundred twelve".