20051533297 has 2 divisors, whose sum is σ = 20051533298. Its totient is φ = 20051533296.

The previous prime is 20051533291. The next prime is 20051533351. The reversal of 20051533297 is 79233515002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19487043216 + 564490081 = 139596^2 + 23759^2 .

It is a cyclic number.

It is not a de Polignac number, because 20051533297 - 2²⁷ = 19917315569 is a prime.

It is not a weakly prime, because it can be changed into another prime (20051533291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025766648 + 10025766649.

It is an arithmetic number, because the mean of its divisors is an integer number (10025766649).

Almost surely, 2^20051533297 is an apocalyptic number.

It is an amenable number.

20051533297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20051533297 is an equidigital number, since it uses as much as digits as its factorization.

20051533297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 37.

The spelling of 20051533297 in words is "twenty billion, fifty-one million, five hundred thirty-three thousand, two hundred ninety-seven".