20042222 has 4 divisors (see below), whose sum is σ = 30063336. Its totient is φ = 10021110.

The previous prime is 20042173. The next prime is 20042249. The reversal of 20042222 is 22224002.

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

20042222 is a modest number, since divided by 2222 gives 2004 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20042197 and 20042206.

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, 5010554 + ... + 5010557.

It is an arithmetic number, because the mean of its divisors is an integer number (7515834).

Almost surely, 2^20042222 is an apocalyptic number.

20042222 is a deficient number, since it is larger than the sum of its proper divisors (10021114).

20042222 is a wasteful number, since it uses less digits than its factorization.

20042222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10021113.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20042222 is about 4476.8540293380. The cubic root of 20042222 is about 271.6326409683.

Adding to 20042222 its reverse (22224002), we get a palindrome (42266224).

The spelling of 20042222 in words is "twenty million, forty-two thousand, two hundred twenty-two".