20433142 has 4 divisors (see below), whose sum is σ = 30649716. Its totient is φ = 10216570.

The previous prime is 20433137. The next prime is 20433163. The reversal of 20433142 is 24133402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24133402 = 2 ⋅12066701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5108284 + ... + 5108287.

It is an arithmetic number, because the mean of its divisors is an integer number (7662429).

Almost surely, 2^20433142 is an apocalyptic number.

20433142 is a deficient number, since it is larger than the sum of its proper divisors (10216574).

20433142 is a wasteful number, since it uses less digits than its factorization.

20433142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10216573.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20433142 is about 4520.3033084075. The cubic root of 20433142 is about 273.3873305311.

Adding to 20433142 its reverse (24133402), we get a palindrome (44566544).

The spelling of 20433142 in words is "twenty million, four hundred thirty-three thousand, one hundred forty-two".