20378305047 has 4 divisors (see below), whose sum is σ = 27171073400. Its totient is φ = 13585536696.

The previous prime is 20378305039. The next prime is 20378305061. The reversal of 20378305047 is 74050387302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20378305047 - 2³ = 20378305039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20378304996 and 20378305014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20378309047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3396384172 + ... + 3396384177.

It is an arithmetic number, because the mean of its divisors is an integer number (6792768350).

Almost surely, 2^20378305047 is an apocalyptic number.

20378305047 is a deficient number, since it is larger than the sum of its proper divisors (6792768353).

20378305047 is an equidigital number, since it uses as much as digits as its factorization.

20378305047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6792768352.

The product of its (nonzero) digits is 141120, while the sum is 39.

The spelling of 20378305047 in words is "twenty billion, three hundred seventy-eight million, three hundred five thousand, forty-seven".