20972016293 has 2 divisors, whose sum is σ = 20972016294. Its totient is φ = 20972016292.

The previous prime is 20972016269. The next prime is 20972016343. The reversal of 20972016293 is 39261027902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19389727009 + 1582289284 = 139247^2 + 39778^2 .

It is a cyclic number.

It is not a de Polignac number, because 20972016293 - 2²⁴ = 20955239077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20972016293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20972016893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10486008146 + 10486008147.

It is an arithmetic number, because the mean of its divisors is an integer number (10486008147).

Almost surely, 2^20972016293 is an apocalyptic number.

It is an amenable number.

20972016293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20972016293 is an equidigital number, since it uses as much as digits as its factorization.

20972016293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 20972016293 in words is "twenty billion, nine hundred seventy-two million, sixteen thousand, two hundred ninety-three".