20154552433 has 4 divisors (see below), whose sum is σ = 20162991220. Its totient is φ = 20146113648.

The previous prime is 20154552391. The next prime is 20154552437. The reversal of 20154552433 is 33425545102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33425545102 = 2 ⋅16712772551.

It can be written as a sum of positive squares in 2 ways, for example, as 9021770289 + 11132782144 = 94983^2 + 105512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20154552433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20154552437) 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, 4215810 + ... + 4220587.

It is an arithmetic number, because the mean of its divisors is an integer number (5040747805).

Almost surely, 2^20154552433 is an apocalyptic number.

It is an amenable number.

20154552433 is a deficient number, since it is larger than the sum of its proper divisors (8438787).

20154552433 is an equidigital number, since it uses as much as digits as its factorization.

20154552433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438786.

The product of its (nonzero) digits is 72000, while the sum is 34.

The spelling of 20154552433 in words is "twenty billion, one hundred fifty-four million, five hundred fifty-two thousand, four hundred thirty-three".