20573399 has 8 divisors (see below), whose sum is σ = 25650048. Its totient is φ = 16031160.

The previous prime is 20573387. The next prime is 20573401. The reversal of 20573399 is 99337502.

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

It is a cyclic number.

It is not a de Polignac number, because 20573399 - 2²⁴ = 3796183 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 (20573309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133517 + ... + 133670.

It is an arithmetic number, because the mean of its divisors is an integer number (3206256).

Almost surely, 2^20573399 is an apocalyptic number.

20573399 is a deficient number, since it is larger than the sum of its proper divisors (5076649).

20573399 is a wasteful number, since it uses less digits than its factorization.

20573399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267205.

The product of its (nonzero) digits is 51030, while the sum is 38.

The square root of 20573399 is about 4535.7908902417. The cubic root of 20573399 is about 274.0114323821.

The spelling of 20573399 in words is "twenty million, five hundred seventy-three thousand, three hundred ninety-nine".