20102222222 has 4 divisors (see below), whose sum is σ = 30153333336. Its totient is φ = 10051111110.

The previous prime is 20102222209. The next prime is 20102222251. The reversal of 20102222222 is 22222220102.

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

20102222222 is a modest number, since divided by 222222 gives 20102 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 20102222222.

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, 5025555554 + ... + 5025555557.

It is an arithmetic number, because the mean of its divisors is an integer number (7538333334).

Almost surely, 2^20102222222 is an apocalyptic number.

20102222222 is a deficient number, since it is larger than the sum of its proper divisors (10051111114).

20102222222 is a wasteful number, since it uses less digits than its factorization.

20102222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051111113.

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

Adding to 20102222222 its reverse (22222220102), we get a palindrome (42324442324).

The spelling of 20102222222 in words is "twenty billion, one hundred two million, two hundred twenty-two thousand, two hundred twenty-two".