23535442621 has 4 divisors (see below), whose sum is σ = 23886717952. Its totient is φ = 23184167292.

The previous prime is 23535442543. The next prime is 23535442649. The reversal of 23535442621 is 12624453532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23535442621 - 2²¹ = 23533345469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23535422621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175637565 + ... + 175637698.

It is an arithmetic number, because the mean of its divisors is an integer number (5971679488).

Almost surely, 2^23535442621 is an apocalyptic number.

It is an amenable number.

23535442621 is a deficient number, since it is larger than the sum of its proper divisors (351275331).

23535442621 is an equidigital number, since it uses as much as digits as its factorization.

23535442621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351275330.

The product of its digits is 172800, while the sum is 37.

The spelling of 23535442621 in words is "twenty-three billion, five hundred thirty-five million, four hundred forty-two thousand, six hundred twenty-one".