26413750021 has 2 divisors, whose sum is σ = 26413750022. Its totient is φ = 26413750020.

The previous prime is 26413750001. The next prime is 26413750031. The reversal of 26413750021 is 12005731462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26239140225 + 174609796 = 161985^2 + 13214^2 .

It is a cyclic number.

It is not a de Polignac number, because 26413750021 - 2²⁹ = 25876879109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26413750001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13206875010 + 13206875011.

It is an arithmetic number, because the mean of its divisors is an integer number (13206875011).

Almost surely, 2^26413750021 is an apocalyptic number.

It is an amenable number.

26413750021 is a deficient number, since it is larger than the sum of its proper divisors (1).

26413750021 is an equidigital number, since it uses as much as digits as its factorization.

26413750021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 26413750021 in words is "twenty-six billion, four hundred thirteen million, seven hundred fifty thousand, twenty-one".