20850047231 has 4 divisors (see below), whose sum is σ = 22453897032. Its totient is φ = 19246197432.

The previous prime is 20850047203. The next prime is 20850047237. The reversal of 20850047231 is 13274005802.

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 20850047231 - 2¹⁴ = 20850030847 is a prime.

It is a super-2 number, since 2×20850047231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850047237) 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, 801924881 + ... + 801924906.

It is an arithmetic number, because the mean of its divisors is an integer number (5613474258).

Almost surely, 2^20850047231 is an apocalyptic number.

20850047231 is a deficient number, since it is larger than the sum of its proper divisors (1603849801).

20850047231 is a wasteful number, since it uses less digits than its factorization.

20850047231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603849800.

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 20850047231 in words is "twenty billion, eight hundred fifty million, forty-seven thousand, two hundred thirty-one".