21867962280193 has 2 divisors, whose sum is σ = 21867962280194. Its totient is φ = 21867962280192.

The previous prime is 21867962280149. The next prime is 21867962280209. The reversal of 21867962280193 is 39108226976812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21344926683249 + 523035596944 = 4620057^2 + 723212^2 .

It is a cyclic number.

It is not a de Polignac number, because 21867962280193 - 2²⁵ = 21867928725761 is a prime.

It is not a weakly prime, because it can be changed into another prime (21867962280133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10933981140096 + 10933981140097.

It is an arithmetic number, because the mean of its divisors is an integer number (10933981140097).

Almost surely, 2^{21867962280193} is an apocalyptic number.

It is an amenable number.

21867962280193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21867962280193 is an equidigital number, since it uses as much as digits as its factorization.

21867962280193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 21867962280193 in words is "twenty-one trillion, eight hundred sixty-seven billion, nine hundred sixty-two million, two hundred eighty thousand, one hundred ninety-three".