20577174223 has 4 divisors (see below), whose sum is σ = 20578106808. Its totient is φ = 20576241640.

The previous prime is 20577174209. The next prime is 20577174271. The reversal of 20577174223 is 32247177502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20577174223 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 (20577174523) 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, 432373 + ... + 477598.

It is an arithmetic number, because the mean of its divisors is an integer number (5144526702).

Almost surely, 2^20577174223 is an apocalyptic number.

20577174223 is a deficient number, since it is larger than the sum of its proper divisors (932585).

20577174223 is an equidigital number, since it uses as much as digits as its factorization.

20577174223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932584.

The product of its (nonzero) digits is 164640, while the sum is 40.

The spelling of 20577174223 in words is "twenty billion, five hundred seventy-seven million, one hundred seventy-four thousand, two hundred twenty-three".