20573823 has 12 divisors (see below), whose sum is σ = 28092120. Its totient is φ = 13393296.

The previous prime is 20573783. The next prime is 20573843. The reversal of 20573823 is 32837502.

It is not a de Polignac number, because 20573823 - 2¹² = 20569727 is a prime.

It is a super-3 number, since 3×20573823³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20573843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3693 + ... + 7401.

It is an arithmetic number, because the mean of its divisors is an integer number (2341010).

Almost surely, 2^20573823 is an apocalyptic number.

20573823 is a deficient number, since it is larger than the sum of its proper divisors (7518297).

20573823 is an equidigital number, since it uses as much as digits as its factorization.

20573823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3798 (or 3755 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20573823 is about 4535.8376293690. The cubic root of 20573823 is about 274.0133147489.

It can be divided in two parts, 205738 and 23, that added together give a triangular number (205761 = T₆₄₁).

The spelling of 20573823 in words is "twenty million, five hundred seventy-three thousand, eight hundred twenty-three".