21842795369 has 4 divisors (see below), whose sum is σ = 22307535744. Its totient is φ = 21378054996.

The previous prime is 21842795353. The next prime is 21842795413. The reversal of 21842795369 is 96359724812.

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 21842795369 - 2⁴ = 21842795353 is a prime.

It is a super-2 number, since 2×21842795369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21842795869) 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, 232370117 + ... + 232370210.

It is an arithmetic number, because the mean of its divisors is an integer number (5576883936).

Almost surely, 2^21842795369 is an apocalyptic number.

It is an amenable number.

21842795369 is a deficient number, since it is larger than the sum of its proper divisors (464740375).

21842795369 is an equidigital number, since it uses as much as digits as its factorization.

21842795369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464740374.

The product of its digits is 6531840, while the sum is 56.

The spelling of 21842795369 in words is "twenty-one billion, eight hundred forty-two million, seven hundred ninety-five thousand, three hundred sixty-nine".