20221210992 has 40 divisors (see below), whose sum is σ = 53649974416. Its totient is φ = 6558230016.

The previous prime is 20221210943. The next prime is 20221210993. The reversal of 20221210992 is 29901212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221210993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5691133 + ... + 5694684.

Almost surely, 2^20221210992 is an apocalyptic number.

It is an amenable number.

20221210992 is an abundant number, since it is smaller than the sum of its proper divisors (33428763424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20221210992 is a wasteful number, since it uses less digits than its factorization.

20221210992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11385865 (or 11385859 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

It can be divided in two parts, 20221210 and 992, that added together give a palindrome (20222202).

The spelling of 20221210992 in words is "twenty billion, two hundred twenty-one million, two hundred ten thousand, nine hundred ninety-two".