20293221648 has 40 divisors (see below), whose sum is σ = 59913322048. Its totient is φ = 5798063232.

The previous prime is 20293221629. The next prime is 20293221649. The reversal of 20293221648 is 84612239202.

It is not an unprimeable number, because it can be changed into a prime (20293221649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30197911 + ... + 30198582.

Almost surely, 2^20293221648 is an apocalyptic number.

20293221648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20293221648 is an abundant number, since it is smaller than the sum of its proper divisors (39620100400).

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

20293221648 is a wasteful number, since it uses less digits than its factorization.

20293221648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60396511 (or 60396505 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 20293221648 in words is "twenty billion, two hundred ninety-three million, two hundred twenty-one thousand, six hundred forty-eight".