20858573023 has 4 divisors (see below), whose sum is σ = 20858990400. Its totient is φ = 20858155648.

The previous prime is 20858572981. The next prime is 20858573033. The reversal of 20858573023 is 32037585802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20858573023 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 (20858573033) 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, 121615 + ... + 237712.

It is an arithmetic number, because the mean of its divisors is an integer number (5214747600).

Almost surely, 2^20858573023 is an apocalyptic number.

20858573023 is a deficient number, since it is larger than the sum of its proper divisors (417377).

20858573023 is an equidigital number, since it uses as much as digits as its factorization.

20858573023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417376.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 20858573023 in words is "twenty billion, eight hundred fifty-eight million, five hundred seventy-three thousand, twenty-three".