23402421455015 has 16 divisors (see below), whose sum is σ = 28680834395520. Its totient is φ = 18323329731840.

The previous prime is 23402421454991. The next prime is 23402421455053. The reversal of 23402421455015 is 51055412420432.

It is not a de Polignac number, because 23402421455015 - 2⁴⁰ = 22302909827239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23402421455015.

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, 16184651 + ... + 17571219.

It is an arithmetic number, because the mean of its divisors is an integer number (1792552149720).

Almost surely, 2^{23402421455015} is an apocalyptic number.

23402421455015 is a deficient number, since it is larger than the sum of its proper divisors (5278412940505).

23402421455015 is a wasteful number, since it uses less digits than its factorization.

23402421455015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458442.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 23402421455015 its reverse (51055412420432), we get a palindrome (74457833875447).

The spelling of 23402421455015 in words is "twenty-three trillion, four hundred two billion, four hundred twenty-one million, four hundred fifty-five thousand, fifteen".