20402402113 has 2 divisors, whose sum is σ = 20402402114. Its totient is φ = 20402402112.

The previous prime is 20402402107. The next prime is 20402402123. The reversal of 20402402113 is 31120420402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14162666049 + 6239736064 = 119007^2 + 78992^2 .

It is a cyclic number.

It is not a de Polignac number, because 20402402113 - 2⁹ = 20402401601 is a prime.

It is not a weakly prime, because it can be changed into another prime (20402402123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201201056 + 10201201057.

It is an arithmetic number, because the mean of its divisors is an integer number (10201201057).

Almost surely, 2^20402402113 is an apocalyptic number.

It is an amenable number.

20402402113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402402113 is an equidigital number, since it uses as much as digits as its factorization.

20402402113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20402402113 its reverse (31120420402), we get a palindrome (51522822515).

The spelling of 20402402113 in words is "twenty billion, four hundred two million, four hundred two thousand, one hundred thirteen".