21437568326263 has 2 divisors, whose sum is σ = 21437568326264. Its totient is φ = 21437568326262.

The previous prime is 21437568326243. The next prime is 21437568326287. The reversal of 21437568326263 is 36262386573412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21437568326263 - 2¹³ = 21437568318071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21437568326198 and 21437568326207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21437568326243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10718784163131 + 10718784163132.

It is an arithmetic number, because the mean of its divisors is an integer number (10718784163132).

Almost surely, 2^{21437568326263} is an apocalyptic number.

21437568326263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21437568326263 is an equidigital number, since it uses as much as digits as its factorization.

21437568326263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 58.

The spelling of 21437568326263 in words is "twenty-one trillion, four hundred thirty-seven billion, five hundred sixty-eight million, three hundred twenty-six thousand, two hundred sixty-three".