20447378583 has 8 divisors (see below), whose sum is σ = 27608275200. Its totient is φ = 13459033848.

The previous prime is 20447378579. The next prime is 20447378647. The reversal of 20447378583 is 38587374402.

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

It is not a de Polignac number, because 20447378583 - 2² = 20447378579 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20447378513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43137693 + ... + 43138166.

It is an arithmetic number, because the mean of its divisors is an integer number (3451034400).

Almost surely, 2^20447378583 is an apocalyptic number.

20447378583 is a deficient number, since it is larger than the sum of its proper divisors (7160896617).

20447378583 is an equidigital number, since it uses as much as digits as its factorization.

20447378583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86275941.

The product of its (nonzero) digits is 4515840, while the sum is 51.

The spelling of 20447378583 in words is "twenty billion, four hundred forty-seven million, three hundred seventy-eight thousand, five hundred eighty-three".