20000357 has 8 divisors (see below), whose sum is σ = 21665784. Its totient is φ = 18353088.

The previous prime is 20000353. The next prime is 20000359. The reversal of 20000357 is 75300002.

It can be written as a sum of positive squares in 4 ways, for example, as 1069156 + 18931201 = 1034^2 + 4351^2 .

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

It is not a de Polignac number, because 20000357 - 2² = 20000353 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 (20000353) 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, 2198 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (2708223).

Almost surely, 2^20000357 is an apocalyptic number.

It is an amenable number.

20000357 is a deficient number, since it is larger than the sum of its proper divisors (1665427).

20000357 is a wasteful number, since it uses less digits than its factorization.

20000357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9079.

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 20000357 is about 4472.1758686349. The cubic root of 20000357 is about 271.4433767284.

Adding to 20000357 its reverse (75300002), we get a palindrome (95300359).

The spelling of 20000357 in words is "twenty million, three hundred fifty-seven", and thus it is an aban number.