21352525204079 has 2 divisors, whose sum is σ = 21352525204080. Its totient is φ = 21352525204078.

The previous prime is 21352525204063. The next prime is 21352525204099. The reversal of 21352525204079 is 97040252525312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21352525204079 - 2⁴ = 21352525204063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21352525204099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676262602039 + 10676262602040.

It is an arithmetic number, because the mean of its divisors is an integer number (10676262602040).

Almost surely, 2^{21352525204079} is an apocalyptic number.

21352525204079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21352525204079 is an equidigital number, since it uses as much as digits as its factorization.

21352525204079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 21352525204079 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred four thousand, seventy-nine".