2021866737 has 16 divisors (see below), whose sum is σ = 2996388288. Its totient is φ = 1202252480.

The previous prime is 2021866733. The next prime is 2021866799. The reversal of 2021866737 is 7376681202.

It is not a de Polignac number, because 2021866737 - 2² = 2021866733 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021866733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576258 + ... + 579755.

It is an arithmetic number, because the mean of its divisors is an integer number (187274268).

Almost surely, 2^2021866737 is an apocalyptic number.

It is an amenable number.

2021866737 is a deficient number, since it is larger than the sum of its proper divisors (974521551).

2021866737 is a wasteful number, since it uses less digits than its factorization.

2021866737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156080.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 2021866737 is about 44965.1724893834. The cubic root of 2021866737 is about 1264.4961434977.

The spelling of 2021866737 in words is "two billion, twenty-one million, eight hundred sixty-six thousand, seven hundred thirty-seven".