20308722648 has 64 divisors (see below), whose sum is σ = 54119340000. Its totient is φ = 6328584192.

The previous prime is 20308722647. The next prime is 20308722667. The reversal of 20308722648 is 84622780302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20308722647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106243 + ... + 227826.

Almost surely, 2^20308722648 is an apocalyptic number.

It is an amenable number.

20308722648 is an abundant number, since it is smaller than the sum of its proper divisors (33810617352).

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

20308722648 is a wasteful number, since it uses less digits than its factorization.

20308722648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334244 (or 334240 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 20308722648 in words is "twenty billion, three hundred eight million, seven hundred twenty-two thousand, six hundred forty-eight".