20423054 has 4 divisors (see below), whose sum is σ = 30634584. Its totient is φ = 10211526.

The previous prime is 20423041. The next prime is 20423071. The reversal of 20423054 is 45032402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45032402 = 2 ⋅22516201.

It is a super-2 number, since 2×20423054² = 834202269373832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5105762 + ... + 5105765.

It is an arithmetic number, because the mean of its divisors is an integer number (7658646).

Almost surely, 2^20423054 is an apocalyptic number.

20423054 is a deficient number, since it is larger than the sum of its proper divisors (10211530).

20423054 is a wasteful number, since it uses less digits than its factorization.

20423054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211529.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20423054 is about 4519.1873163214. The cubic root of 20423054 is about 273.3423319795.

Adding to 20423054 its reverse (45032402), we get a palindrome (65455456).

The spelling of 20423054 in words is "twenty million, four hundred twenty-three thousand, fifty-four".