20122442 has 4 divisors (see below), whose sum is σ = 30183666. Its totient is φ = 10061220.

The previous prime is 20122429. The next prime is 20122469. The reversal of 20122442 is 24422102.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 10764961 + 9357481 = 3281^2 + 3059^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20122442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030609 + ... + 5030612.

Almost surely, 2^20122442 is an apocalyptic number.

20122442 is a deficient number, since it is larger than the sum of its proper divisors (10061224).

20122442 is a wasteful number, since it uses less digits than its factorization.

20122442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061223.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20122442 is about 4485.8044986379. The cubic root of 20122442 is about 271.9945662842.

Adding to 20122442 its reverse (24422102), we get a palindrome (44544544).

The spelling of 20122442 in words is "twenty million, one hundred twenty-two thousand, four hundred forty-two".