20317781360 has 20 divisors (see below), whose sum is σ = 47238841848. Its totient is φ = 8127112512.

The previous prime is 20317781329. The next prime is 20317781389. The reversal of 20317781360 is 6318771302.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 126986054 + ... + 126986213.

Almost surely, 2^20317781360 is an apocalyptic number.

20317781360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20317781360 is an abundant number, since it is smaller than the sum of its proper divisors (26921060488).

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

20317781360 is a wasteful number, since it uses less digits than its factorization.

20317781360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253972280 (or 253972274 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 20317781360 in words is "twenty billion, three hundred seventeen million, seven hundred eighty-one thousand, three hundred sixty".