23420643254 has 4 divisors (see below), whose sum is σ = 35130964884. Its totient is φ = 11710321626.

The previous prime is 23420643247. The next prime is 23420643263. The reversal of 23420643254 is 45234602432.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×23420643254² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5855160812 + ... + 5855160815.

It is an arithmetic number, because the mean of its divisors is an integer number (8782741221).

Almost surely, 2^23420643254 is an apocalyptic number.

23420643254 is a deficient number, since it is larger than the sum of its proper divisors (11710321630).

23420643254 is a wasteful number, since it uses less digits than its factorization.

23420643254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11710321629.

The product of its (nonzero) digits is 138240, while the sum is 35.

The spelling of 23420643254 in words is "twenty-three billion, four hundred twenty million, six hundred forty-three thousand, two hundred fifty-four".