21198862626353 has 2 divisors, whose sum is σ = 21198862626354. Its totient is φ = 21198862626352.

The previous prime is 21198862626301. The next prime is 21198862626397. The reversal of 21198862626353 is 35362626889112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18222713203249 + 2976149423104 = 4268807^2 + 1725152^2 .

It is a cyclic number.

It is not a de Polignac number, because 21198862626353 - 2³⁸ = 20923984719409 is a prime.

It is not a weakly prime, because it can be changed into another prime (21198862326353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10599431313176 + 10599431313177.

It is an arithmetic number, because the mean of its divisors is an integer number (10599431313177).

Almost surely, 2^{21198862626353} is an apocalyptic number.

It is an amenable number.

21198862626353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21198862626353 is an equidigital number, since it uses as much as digits as its factorization.

21198862626353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 62.

The spelling of 21198862626353 in words is "twenty-one trillion, one hundred ninety-eight billion, eight hundred sixty-two million, six hundred twenty-six thousand, three hundred fifty-three".