20022221236 has 48 divisors (see below), whose sum is σ = 36467988480. Its totient is φ = 9611612640.

The previous prime is 20022221221. The next prime is 20022221237. The reversal of 20022221236 is 63212222002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022221237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4381825 + ... + 4386391.

It is an arithmetic number, because the mean of its divisors is an integer number (759749760).

Almost surely, 2^20022221236 is an apocalyptic number.

It is an amenable number.

20022221236 is a deficient number, since it is larger than the sum of its proper divisors (16445767244).

20022221236 is a wasteful number, since it uses less digits than its factorization.

20022221236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044 (or 5042 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20022221236 its reverse (63212222002), we get a palindrome (83234443238).

The spelling of 20022221236 in words is "twenty billion, twenty-two million, two hundred twenty-one thousand, two hundred thirty-six".