20317747380 has 96 divisors (see below), whose sum is σ = 65056884480. Its totient is φ = 4641192960.

The previous prime is 20317747369. The next prime is 20317747381. The reversal of 20317747380 is 8374771302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20317747381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 708766 + ... + 736874.

It is an arithmetic number, because the mean of its divisors is an integer number (677675880).

Almost surely, 2^20317747380 is an apocalyptic number.

20317747380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20317747380 is an abundant number, since it is smaller than the sum of its proper divisors (44739137100).

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

20317747380 is a wasteful number, since it uses less digits than its factorization.

20317747380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29849 (or 29847 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The spelling of 20317747380 in words is "twenty billion, three hundred seventeen million, seven hundred forty-seven thousand, three hundred eighty".