21192408241 has 4 divisors (see below), whose sum is σ = 21643310592. Its totient is φ = 20741505892.

The previous prime is 21192408203. The next prime is 21192408277. The reversal of 21192408241 is 14280429112.

It is a happy number.

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 not a de Polignac number, because 21192408241 - 2⁹ = 21192407729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21192408197 and 21192408206.

It is not an unprimeable number, because it can be changed into a prime (21192402241) 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, 225451105 + ... + 225451198.

It is an arithmetic number, because the mean of its divisors is an integer number (5410827648).

Almost surely, 2^21192408241 is an apocalyptic number.

It is an amenable number.

21192408241 is a deficient number, since it is larger than the sum of its proper divisors (450902351).

21192408241 is an equidigital number, since it uses as much as digits as its factorization.

21192408241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450902350.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 21192408241 in words is "twenty-one billion, one hundred ninety-two million, four hundred eight thousand, two hundred forty-one".