20620310653 has 2 divisors, whose sum is σ = 20620310654. Its totient is φ = 20620310652.

The previous prime is 20620310651. The next prime is 20620310663. The reversal of 20620310653 is 35601302602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12696106329 + 7924204324 = 112677^2 + 89018^2 .

It is a cyclic number.

It is not a de Polignac number, because 20620310653 - 2¹ = 20620310651 is a prime.

It is a super-2 number, since 2×20620310653² (a number of 21 digits) contains 22 as substring.

Together with 20620310651, 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 (20620310651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310155326 + 10310155327.

It is an arithmetic number, because the mean of its divisors is an integer number (10310155327).

Almost surely, 2^20620310653 is an apocalyptic number.

It is an amenable number.

20620310653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620310653 is an equidigital number, since it uses as much as digits as its factorization.

20620310653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 20620310653 in words is "twenty billion, six hundred twenty million, three hundred ten thousand, six hundred fifty-three".