23503403455555 has 4 divisors (see below), whose sum is σ = 28204084146672. Its totient is φ = 18802722764440.

The previous prime is 23503403455529. The next prime is 23503403455621. The reversal of 23503403455555 is 55555430430532.

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

It is not a de Polignac number, because 23503403455555 - 2³⁵ = 23469043717187 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23503403455499 and 23503403455508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2350340345551 + ... + 2350340345560.

It is an arithmetic number, because the mean of its divisors is an integer number (7051021036668).

Almost surely, 2^{23503403455555} is an apocalyptic number.

23503403455555 is a deficient number, since it is larger than the sum of its proper divisors (4700680691117).

23503403455555 is an equidigital number, since it uses as much as digits as its factorization.

23503403455555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700680691116.

The product of its (nonzero) digits is 13500000, while the sum is 49.

The spelling of 23503403455555 in words is "twenty-three trillion, five hundred three billion, four hundred three million, four hundred fifty-five thousand, five hundred fifty-five".