20317252880 has 40 divisors (see below), whose sum is σ = 47398888152. Its totient is φ = 8099154944.

The previous prime is 20317252853. The next prime is 20317252897. The reversal of 20317252880 is 8825271302.

It can be written as a sum of positive squares in 4 ways, for example, as 14121044224 + 6196208656 = 118832^2 + 78716^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409949 + ... + 456828.

Almost surely, 2^20317252880 is an apocalyptic number.

20317252880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20317252880 is an abundant number, since it is smaller than the sum of its proper divisors (27081635272).

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

20317252880 is a wasteful number, since it uses less digits than its factorization.

20317252880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867083 (or 867077 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 20317252880 in words is "twenty billion, three hundred seventeen million, two hundred fifty-two thousand, eight hundred eighty".