20157801 has 8 divisors (see below), whose sum is σ = 28458144. Its totient is φ = 12648000.

The previous prime is 20157791. The next prime is 20157811. The reversal of 20157801 is 10875102.

It is an interprime number because it is at equal distance from previous prime (20157791) and next prime (20157811).

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

It is not a de Polignac number, because 20157801 - 2⁶ = 20157737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20157811) 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, 197575 + ... + 197676.

It is an arithmetic number, because the mean of its divisors is an integer number (3557268).

Almost surely, 2^20157801 is an apocalyptic number.

It is an amenable number.

20157801 is a deficient number, since it is larger than the sum of its proper divisors (8300343).

20157801 is a wasteful number, since it uses less digits than its factorization.

20157801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395271.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 20157801 is about 4489.7439793378. The cubic root of 20157801 is about 272.1537886443.

The spelling of 20157801 in words is "twenty million, one hundred fifty-seven thousand, eight hundred one".