20722788328 has 16 divisors (see below), whose sum is σ = 42387521760. Its totient is φ = 9419449200.

The previous prime is 20722788277. The next prime is 20722788329. The reversal of 20722788328 is 82388722702.

It is not an unprimeable number, because it can be changed into a prime (20722788329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117743028 + ... + 117743203.

It is an arithmetic number, because the mean of its divisors is an integer number (2649220110).

Almost surely, 2^20722788328 is an apocalyptic number.

It is an amenable number.

20722788328 is an abundant number, since it is smaller than the sum of its proper divisors (21664733432).

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

20722788328 is a wasteful number, since it uses less digits than its factorization.

20722788328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235486248 (or 235486244 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 20722788328 in words is "twenty billion, seven hundred twenty-two million, seven hundred eighty-eight thousand, three hundred twenty-eight".