20620651133 has 2 divisors, whose sum is σ = 20620651134. Its totient is φ = 20620651132.

The previous prime is 20620651123. The next prime is 20620651147. The reversal of 20620651133 is 33115602602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14069043769 + 6551607364 = 118613^2 + 80942^2 .

It is a cyclic number.

It is not a de Polignac number, because 20620651133 - 2³² = 16325683837 is a prime.

It is a super-2 number, since 2×20620651133² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20620651096 and 20620651105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20620651123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310325566 + 10310325567.

It is an arithmetic number, because the mean of its divisors is an integer number (10310325567).

Almost surely, 2^20620651133 is an apocalyptic number.

It is an amenable number.

20620651133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620651133 is an equidigital number, since it uses as much as digits as its factorization.

20620651133 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 29.

The spelling of 20620651133 in words is "twenty billion, six hundred twenty million, six hundred fifty-one thousand, one hundred thirty-three".