23436543157 has 4 divisors (see below), whose sum is σ = 23438959360. Its totient is φ = 23434126956.

The previous prime is 23436543133. The next prime is 23436543199. The reversal of 23436543157 is 75134563432.

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 23436543157 - 2⁷ = 23436543029 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 (23436543127) 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, 1193493 + ... + 1212970.

It is an arithmetic number, because the mean of its divisors is an integer number (5859739840).

Almost surely, 2^23436543157 is an apocalyptic number.

It is an amenable number.

23436543157 is a deficient number, since it is larger than the sum of its proper divisors (2416203).

23436543157 is an equidigital number, since it uses as much as digits as its factorization.

23436543157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416202.

The product of its digits is 907200, while the sum is 43.

The spelling of 23436543157 in words is "twenty-three billion, four hundred thirty-six million, five hundred forty-three thousand, one hundred fifty-seven".