20422221292 has 24 divisors (see below), whose sum is σ = 40245553152. Its totient is φ = 8983381200.

The previous prime is 20422221277. The next prime is 20422221301. The reversal of 20422221292 is 29212222402.

20422221292 is nontrivially palindromic in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 20422221292.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7484788 + ... + 7487515.

It is an arithmetic number, because the mean of its divisors is an integer number (1676898048).

Almost surely, 2^20422221292 is an apocalyptic number.

20422221292 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20422221292 is a deficient number, since it is larger than the sum of its proper divisors (19823331860).

20422221292 is a wasteful number, since it uses less digits than its factorization.

20422221292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14972349 (or 14972347 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 20422221292 its reverse (29212222402), we get a palindrome (49634443694).

The spelling of 20422221292 in words is "twenty billion, four hundred twenty-two million, two hundred twenty-one thousand, two hundred ninety-two".