21046282529 has 2 divisors, whose sum is σ = 21046282530. Its totient is φ = 21046282528.

The previous prime is 21046282519. The next prime is 21046282553. The reversal of 21046282529 is 92528264012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19669501504 + 1376781025 = 140248^2 + 37105^2 .

It is a cyclic number.

It is not a de Polignac number, because 21046282529 - 2⁴ = 21046282513 is a prime.

It is not a weakly prime, because it can be changed into another prime (21046282519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10523141264 + 10523141265.

It is an arithmetic number, because the mean of its divisors is an integer number (10523141265).

Almost surely, 2^21046282529 is an apocalyptic number.

It is an amenable number.

21046282529 is a deficient number, since it is larger than the sum of its proper divisors (1).

21046282529 is an equidigital number, since it uses as much as digits as its factorization.

21046282529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 21046282529 in words is "twenty-one billion, forty-six million, two hundred eighty-two thousand, five hundred twenty-nine".