23557321533 has 16 divisors (see below), whose sum is σ = 33170296320. Its totient is φ = 14841067824.

The previous prime is 23557321517. The next prime is 23557321537. The reversal of 23557321533 is 33512375532.

It is not a de Polignac number, because 23557321533 - 2⁴ = 23557321517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23557321491 and 23557321500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23557321537) 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 15 ways as a sum of consecutive naturals, for example, 2050963 + ... + 2062416.

It is an arithmetic number, because the mean of its divisors is an integer number (2073143520).

Almost surely, 2^23557321533 is an apocalyptic number.

23557321533 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23557321533 is a deficient number, since it is larger than the sum of its proper divisors (9612974787).

23557321533 is a wasteful number, since it uses less digits than its factorization.

23557321533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113488.

The product of its digits is 283500, while the sum is 39.

The spelling of 23557321533 in words is "twenty-three billion, five hundred fifty-seven million, three hundred twenty-one thousand, five hundred thirty-three".