2040421987 has 2 divisors, whose sum is σ = 2040421988. Its totient is φ = 2040421986.

The previous prime is 2040421973. The next prime is 2040421993. The reversal of 2040421987 is 7891240402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2040421987 - 2²³ = 2032033379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2040421907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020210993 + 1020210994.

It is an arithmetic number, because the mean of its divisors is an integer number (1020210994).

Almost surely, 2^2040421987 is an apocalyptic number.

2040421987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040421987 is an equidigital number, since it uses as much as digits as its factorization.

2040421987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 2040421987 is about 45171.0303955976. The cubic root of 2040421987 is about 1268.3525846234.

The spelling of 2040421987 in words is "two billion, forty million, four hundred twenty-one thousand, nine hundred eighty-seven".