20808476534 has 8 divisors (see below), whose sum is σ = 31213446120. Its totient is φ = 10403994496.

The previous prime is 20808476531. The next prime is 20808476539. The reversal of 20808476534 is 43567480802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20808476531) 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, 16022 + ... + 204630.

It is an arithmetic number, because the mean of its divisors is an integer number (3901680765).

Almost surely, 2^20808476534 is an apocalyptic number.

20808476534 is a deficient number, since it is larger than the sum of its proper divisors (10404969586).

20808476534 is a wasteful number, since it uses less digits than its factorization.

20808476534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243774.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 20808476534 in words is "twenty billion, eight hundred eight million, four hundred seventy-six thousand, five hundred thirty-four".