23445013457 has 4 divisors (see below), whose sum is σ = 23580533940. Its totient is φ = 23309492976.

The previous prime is 23445013433. The next prime is 23445013507. The reversal of 23445013457 is 75431054432.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19996505281 + 3448508176 = 141409^2 + 58724^2 .

It is a cyclic number.

It is not a de Polignac number, because 23445013457 - 2²⁰ = 23443964881 is a prime.

It is a super-4 number, since 4×23445013457⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23445013457.

It is not an unprimeable number, because it can be changed into a prime (23445013357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67759982 + ... + 67760327.

It is an arithmetic number, because the mean of its divisors is an integer number (5895133485).

Almost surely, 2^23445013457 is an apocalyptic number.

It is an amenable number.

23445013457 is a deficient number, since it is larger than the sum of its proper divisors (135520483).

23445013457 is a wasteful number, since it uses less digits than its factorization.

23445013457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135520482.

The product of its (nonzero) digits is 201600, while the sum is 38.

Adding to 23445013457 its reverse (75431054432), we get a palindrome (98876067889).

The spelling of 23445013457 in words is "twenty-three billion, four hundred forty-five million, thirteen thousand, four hundred fifty-seven".