21253100262463 has 2 divisors, whose sum is σ = 21253100262464. Its totient is φ = 21253100262462.

The previous prime is 21253100262451. The next prime is 21253100262469. The reversal of 21253100262463 is 36426200135212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21253100262463 - 2¹⁷ = 21253100131391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21253100262469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10626550131231 + 10626550131232.

It is an arithmetic number, because the mean of its divisors is an integer number (10626550131232).

Almost surely, 2^{21253100262463} is an apocalyptic number.

21253100262463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21253100262463 is an equidigital number, since it uses as much as digits as its factorization.

21253100262463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 21253100262463 its reverse (36426200135212), we get a palindrome (57679300397675).

The spelling of 21253100262463 in words is "twenty-one trillion, two hundred fifty-three billion, one hundred million, two hundred sixty-two thousand, four hundred sixty-three".