20827837423 has 4 divisors (see below), whose sum is σ = 20977678120. Its totient is φ = 20677996728.

The previous prime is 20827837399. The next prime is 20827837441. The reversal of 20827837423 is 32473872802.

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 20827837423 - 2⁵ = 20827837391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20827837493) 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 3 ways as a sum of consecutive naturals, for example, 74920140 + ... + 74920417.

It is an arithmetic number, because the mean of its divisors is an integer number (5244419530).

Almost surely, 2^20827837423 is an apocalyptic number.

20827837423 is a deficient number, since it is larger than the sum of its proper divisors (149840697).

20827837423 is a wasteful number, since it uses less digits than its factorization.

20827837423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149840696.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 20827837423 in words is "twenty billion, eight hundred twenty-seven million, eight hundred thirty-seven thousand, four hundred twenty-three".