20867834293 has 2 divisors, whose sum is σ = 20867834294. Its totient is φ = 20867834292.

The previous prime is 20867834269. The next prime is 20867834303. The reversal of 20867834293 is 39243876802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10711629009 + 10156205284 = 103497^2 + 100778^2 .

It is a cyclic number.

It is not a de Polignac number, because 20867834293 - 2⁹ = 20867833781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20867834293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20867831293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10433917146 + 10433917147.

It is an arithmetic number, because the mean of its divisors is an integer number (10433917147).

Almost surely, 2^20867834293 is an apocalyptic number.

It is an amenable number.

20867834293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20867834293 is an equidigital number, since it uses as much as digits as its factorization.

20867834293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 20867834293 in words is "twenty billion, eight hundred sixty-seven million, eight hundred thirty-four thousand, two hundred ninety-three".