20494672613 has 2 divisors, whose sum is σ = 20494672614. Its totient is φ = 20494672612.

The previous prime is 20494672607. The next prime is 20494672691. The reversal of 20494672613 is 31627649402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19010342884 + 1484329729 = 137878^2 + 38527^2 .

It is a cyclic number.

It is not a de Polignac number, because 20494672613 - 2²⁴ = 20477895397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20494677613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10247336306 + 10247336307.

It is an arithmetic number, because the mean of its divisors is an integer number (10247336307).

Almost surely, 2^20494672613 is an apocalyptic number.

It is an amenable number.

20494672613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20494672613 is an equidigital number, since it uses as much as digits as its factorization.

20494672613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 20494672613 in words is "twenty billion, four hundred ninety-four million, six hundred seventy-two thousand, six hundred thirteen".