20317625740 has 24 divisors (see below), whose sum is σ = 43820178192. Its totient is φ = 7907400000.

The previous prime is 20317625719. The next prime is 20317625747. The reversal of 20317625740 is 4752671302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 20317625740.

It is not an unprimeable number, because it can be changed into a prime (20317625747) 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, 13727386 + ... + 13728865.

It is an arithmetic number, because the mean of its divisors is an integer number (1825840758).

Almost surely, 2^20317625740 is an apocalyptic number.

20317625740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20317625740 is an abundant number, since it is smaller than the sum of its proper divisors (23502552452).

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

20317625740 is a wasteful number, since it uses less digits than its factorization.

20317625740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27456297 (or 27456295 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 20317625740 in words is "twenty billion, three hundred seventeen million, six hundred twenty-five thousand, seven hundred forty".