20858543031 has 8 divisors (see below), whose sum is σ = 27856762480. Its totient is φ = 13883009472.

The previous prime is 20858542981. The next prime is 20858543033. The reversal of 20858543031 is 13034585802.

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

It is not a de Polignac number, because 20858543031 - 2²² = 20854348727 is a prime.

It is a super-2 number, since 2×20858543031² (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 (20858543033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5669326 + ... + 5673003.

It is an arithmetic number, because the mean of its divisors is an integer number (3482095310).

Almost surely, 2^20858543031 is an apocalyptic number.

20858543031 is a deficient number, since it is larger than the sum of its proper divisors (6998219449).

20858543031 is a wasteful number, since it uses less digits than its factorization.

20858543031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11342945.

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 20858543031 in words is "twenty billion, eight hundred fifty-eight million, five hundred forty-three thousand, thirty-one".