20221342 has 4 divisors (see below), whose sum is σ = 30332016. Its totient is φ = 10110670.

The previous prime is 20221319. The next prime is 20221343. The reversal of 20221342 is 24312202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24312202 = 2 ⋅12156101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221343) 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 as a sum of consecutive naturals, namely, 5055334 + ... + 5055337.

It is an arithmetic number, because the mean of its divisors is an integer number (7583004).

Almost surely, 2^20221342 is an apocalyptic number.

20221342 is a deficient number, since it is larger than the sum of its proper divisors (10110674).

20221342 is a wasteful number, since it uses less digits than its factorization.

20221342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110673.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20221342 is about 4496.8146503942. The cubic root of 20221342 is about 272.4394478705.

Adding to 20221342 its reverse (24312202), we get a palindrome (44533544).

It can be divided in two parts, 2022 and 1342, that added together give a square (3364 = 58²).

The spelling of 20221342 in words is "twenty million, two hundred twenty-one thousand, three hundred forty-two".