20225820613 has 2 divisors, whose sum is σ = 20225820614. Its totient is φ = 20225820612.

The previous prime is 20225820611. The next prime is 20225820617. The reversal of 20225820613 is 31602852202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13429796769 + 6796023844 = 115887^2 + 82438^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225820613 - 2¹ = 20225820611 is a prime.

Together with 20225820611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20225820611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112910306 + 10112910307.

It is an arithmetic number, because the mean of its divisors is an integer number (10112910307).

Almost surely, 2^20225820613 is an apocalyptic number.

It is an amenable number.

20225820613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225820613 is an equidigital number, since it uses as much as digits as its factorization.

20225820613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 20225820613 in words is "twenty billion, two hundred twenty-five million, eight hundred twenty thousand, six hundred thirteen".