20834806407 has 4 divisors (see below), whose sum is σ = 27779741880. Its totient is φ = 13889870936.

The previous prime is 20834806397. The next prime is 20834806453. The reversal of 20834806407 is 70460843802.

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

It is a cyclic number.

It is not a de Polignac number, because 20834806407 - 2¹⁵ = 20834773639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20834806457) 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, 3472467732 + ... + 3472467737.

It is an arithmetic number, because the mean of its divisors is an integer number (6944935470).

Almost surely, 2^20834806407 is an apocalyptic number.

20834806407 is a deficient number, since it is larger than the sum of its proper divisors (6944935473).

20834806407 is an equidigital number, since it uses as much as digits as its factorization.

20834806407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6944935472.

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 20834806407 in words is "twenty billion, eight hundred thirty-four million, eight hundred six thousand, four hundred seven".