20123623 has 8 divisors (see below), whose sum is σ = 22081248. Its totient is φ = 18224544.

The previous prime is 20123617. The next prime is 20123627. The reversal of 20123623 is 32632102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20123623 - 2²¹ = 18026471 is a prime.

It is a super-2 number, since 2×20123623² = 809920405292258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13915 + ... + 15292.

It is an arithmetic number, because the mean of its divisors is an integer number (2760156).

Almost surely, 2^20123623 is an apocalyptic number.

20123623 is a deficient number, since it is larger than the sum of its proper divisors (1957625).

20123623 is a wasteful number, since it uses less digits than its factorization.

20123623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29273.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20123623 is about 4485.9361341865. The cubic root of 20123623 is about 271.9998873630. Note that the first 3 decimals are identical.

Adding to 20123623 its reverse (32632102), we get a palindrome (52755725).

The spelling of 20123623 in words is "twenty million, one hundred twenty-three thousand, six hundred twenty-three".