2040880021 has 2 divisors, whose sum is σ = 2040880022. Its totient is φ = 2040880020.

The previous prime is 2040879991. The next prime is 2040880031. The reversal of 2040880021 is 1200880402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1470339025 + 570540996 = 38345^2 + 23886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040880021 - 2¹³ = 2040871829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040880031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020440010 + 1020440011.

It is an arithmetic number, because the mean of its divisors is an integer number (1020440011).

Almost surely, 2^2040880021 is an apocalyptic number.

It is an amenable number.

2040880021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040880021 is an equidigital number, since it uses as much as digits as its factorization.

2040880021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 2040880021 is about 45176.1001083538. The cubic root of 2040880021 is about 1268.4474841338.

The spelling of 2040880021 in words is "two billion, forty million, eight hundred eighty thousand, twenty-one".