23221420320405 has 16 divisors (see below), whose sum is σ = 37154654455680. Its totient is φ = 12384630189888.

The previous prime is 23221420320353. The next prime is 23221420320433. The reversal of 23221420320405 is 50402302412232.

It is not a de Polignac number, because 23221420320405 - 2⁶ = 23221420320341 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6440022 + ... + 9376391.

It is an arithmetic number, because the mean of its divisors is an integer number (2322165903480).

Almost surely, 2^{23221420320405} is an apocalyptic number.

It is an amenable number.

23221420320405 is a deficient number, since it is larger than the sum of its proper divisors (13933234135275).

23221420320405 is a wasteful number, since it uses less digits than its factorization.

23221420320405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15914300.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 23221420320405 its reverse (50402302412232), we get a palindrome (73623722732637).

The spelling of 23221420320405 in words is "twenty-three trillion, two hundred twenty-one billion, four hundred twenty million, three hundred twenty thousand, four hundred five".