22721782986 has 128 divisors (see below), whose sum is σ = 58222080000. Its totient is φ = 6434188992.

The previous prime is 22721782957. The next prime is 22721782997. The reversal of 22721782986 is 68928712722.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28508740 + ... + 28509536.

It is an arithmetic number, because the mean of its divisors is an integer number (454860000).

Almost surely, 2^22721782986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22721782986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29111040000).

22721782986 is an abundant number, since it is smaller than the sum of its proper divisors (35500297014).

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

22721782986 is a wasteful number, since it uses less digits than its factorization.

22721782986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1387 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 22721782986 in words is "twenty-two billion, seven hundred twenty-one million, seven hundred eighty-two thousand, nine hundred eighty-six".