20157403 has 8 divisors (see below), whose sum is σ = 23329280. Its totient is φ = 17058600.

The previous prime is 20157391. The next prime is 20157413. The reversal of 20157403 is 30475102.

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 20157403 - 2¹³ = 20149211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20157413) 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, 17673 + ... + 18778.

It is an arithmetic number, because the mean of its divisors is an integer number (2916160).

Almost surely, 2^20157403 is an apocalyptic number.

20157403 is a deficient number, since it is larger than the sum of its proper divisors (3171877).

20157403 is an equidigital number, since it uses as much as digits as its factorization.

20157403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36537.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20157403 is about 4489.6996558790. The cubic root of 20157403 is about 272.1519974781.

The spelling of 20157403 in words is "twenty million, one hundred fifty-seven thousand, four hundred three".