21980435222 has 4 divisors (see below), whose sum is σ = 32970652836. Its totient is φ = 10990217610.

The previous prime is 21980435167. The next prime is 21980435227. The reversal of 21980435222 is 22253408912.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21980435227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5495108804 + ... + 5495108807.

It is an arithmetic number, because the mean of its divisors is an integer number (8242663209).

Almost surely, 2^21980435222 is an apocalyptic number.

21980435222 is a deficient number, since it is larger than the sum of its proper divisors (10990217614).

21980435222 is a wasteful number, since it uses less digits than its factorization.

21980435222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990217613.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 21980435222 in words is "twenty-one billion, nine hundred eighty million, four hundred thirty-five thousand, two hundred twenty-two".