23506021553 has 8 divisors (see below), whose sum is σ = 26870489472. Its totient is φ = 20143169856.

The previous prime is 23506021541. The next prime is 23506021607. The reversal of 23506021553 is 35512060532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23506021553 - 2¹⁶ = 23505956017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23506026553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372725 + ... + 431202.

It is an arithmetic number, because the mean of its divisors is an integer number (3358811184).

Almost surely, 2^23506021553 is an apocalyptic number.

It is an amenable number.

23506021553 is a deficient number, since it is larger than the sum of its proper divisors (3364467919).

23506021553 is an equidigital number, since it uses as much as digits as its factorization.

23506021553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808111.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 23506021553 in words is "twenty-three billion, five hundred six million, twenty-one thousand, five hundred fifty-three".