20001357 has 32 divisors (see below), whose sum is σ = 31539200. Its totient is φ = 12492144.

The previous prime is 20001341. The next prime is 20001361. The reversal of 20001357 is 75310002.

It is not a de Polignac number, because 20001357 - 2⁴ = 20001341 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 (20001307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64998 + ... + 65304.

It is an arithmetic number, because the mean of its divisors is an integer number (985600).

Almost surely, 2^20001357 is an apocalyptic number.

20001357 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20001357 is a deficient number, since it is larger than the sum of its proper divisors (11537843).

20001357 is a wasteful number, since it uses less digits than its factorization.

20001357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 20001357 is about 4472.2876696384. The cubic root of 20001357 is about 271.4479006285.

Adding to 20001357 its reverse (75310002), we get a palindrome (95311359).

The spelling of 20001357 in words is "twenty million, one thousand, three hundred fifty-seven".