20315889047 has 8 divisors (see below), whose sum is σ = 20401661952. Its totient is φ = 20230155000.

The previous prime is 20315889043. The next prime is 20315889059. The reversal of 20315889047 is 74098851302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20315889047 - 2² = 20315889043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20315888992 and 20315889010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315889043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1567568 + ... + 1580474.

It is an arithmetic number, because the mean of its divisors is an integer number (2550207744).

Almost surely, 2^20315889047 is an apocalyptic number.

20315889047 is a deficient number, since it is larger than the sum of its proper divisors (85772905).

20315889047 is a wasteful number, since it uses less digits than its factorization.

20315889047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19429.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 20315889047 in words is "twenty billion, three hundred fifteen million, eight hundred eighty-nine thousand, forty-seven".