20177423 has 4 divisors (see below), whose sum is σ = 23059920. Its totient is φ = 17294928.

The previous prime is 20177413. The next prime is 20177447. The reversal of 20177423 is 32477102.

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

It is not a de Polignac number, because 20177423 - 2⁴ = 20177407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20177392 and 20177401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20177413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1441238 + ... + 1441251.

It is an arithmetic number, because the mean of its divisors is an integer number (5764980).

Almost surely, 2^20177423 is an apocalyptic number.

20177423 is a deficient number, since it is larger than the sum of its proper divisors (2882497).

20177423 is an equidigital number, since it uses as much as digits as its factorization.

20177423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882496.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20177423 is about 4491.9286503683. The cubic root of 20177423 is about 272.2420666238.

The spelling of 20177423 in words is "twenty million, one hundred seventy-seven thousand, four hundred twenty-three".