21262248529 has 4 divisors (see below), whose sum is σ = 21308171776. Its totient is φ = 21216325284.

The previous prime is 21262248523. The next prime is 21262248533. The reversal of 21262248529 is 92584226212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21262248529 - 2⁷ = 21262248401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21262248523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22960929 + ... + 22961854.

It is an arithmetic number, because the mean of its divisors is an integer number (5327042944).

Almost surely, 2^21262248529 is an apocalyptic number.

It is an amenable number.

21262248529 is a deficient number, since it is larger than the sum of its proper divisors (45923247).

21262248529 is an equidigital number, since it uses as much as digits as its factorization.

21262248529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45923246.

The product of its digits is 276480, while the sum is 43.

The spelling of 21262248529 in words is "twenty-one billion, two hundred sixty-two million, two hundred forty-eight thousand, five hundred twenty-nine".