20205357 has 8 divisors (see below), whose sum is σ = 27059040. Its totient is φ = 13410960.

The previous prime is 20205343. The next prime is 20205371. The reversal of 20205357 is 75350202.

It is an interprime number because it is at equal distance from previous prime (20205343) and next prime (20205371).

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

It is not a de Polignac number, because 20205357 - 2¹⁵ = 20172589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14019 + ... + 15392.

It is an arithmetic number, because the mean of its divisors is an integer number (3382380).

Almost surely, 2^20205357 is an apocalyptic number.

It is an amenable number.

20205357 is a deficient number, since it is larger than the sum of its proper divisors (6853683).

20205357 is a wasteful number, since it uses less digits than its factorization.

20205357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29643.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20205357 is about 4495.0369297704. The cubic root of 20205357 is about 272.3676410206.

Adding to 20205357 its reverse (75350202), we get a palindrome (95555559).

The spelling of 20205357 in words is "twenty million, two hundred five thousand, three hundred fifty-seven".