20402401601 has 2 divisors, whose sum is σ = 20402401602. Its totient is φ = 20402401600.

The previous prime is 20402401553. The next prime is 20402401681. The reversal of 20402401601 is 10610420402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16261350400 + 4141051201 = 127520^2 + 64351^2 .

It is a cyclic number.

It is not a de Polignac number, because 20402401601 - 2²⁶ = 20335292737 is a prime.

It is not a weakly prime, because it can be changed into another prime (20402401681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201200800 + 10201200801.

It is an arithmetic number, because the mean of its divisors is an integer number (10201200801).

Almost surely, 2^20402401601 is an apocalyptic number.

It is an amenable number.

20402401601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402401601 is an equidigital number, since it uses as much as digits as its factorization.

20402401601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The spelling of 20402401601 in words is "twenty billion, four hundred two million, four hundred one thousand, six hundred one".