20437401671 has 2 divisors, whose sum is σ = 20437401672. Its totient is φ = 20437401670.

The previous prime is 20437401599. The next prime is 20437401679. The reversal of 20437401671 is 17610473402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20437401671 - 2¹⁰ = 20437400647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20437401679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10218700835 + 10218700836.

It is an arithmetic number, because the mean of its divisors is an integer number (10218700836).

Almost surely, 2^20437401671 is an apocalyptic number.

20437401671 is a deficient number, since it is larger than the sum of its proper divisors (1).

20437401671 is an equidigital number, since it uses as much as digits as its factorization.

20437401671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 20437401671 in words is "twenty billion, four hundred thirty-seven million, four hundred one thousand, six hundred seventy-one".