20157603 has 8 divisors (see below), whose sum is σ = 26907216. Its totient is φ = 13423200.

The previous prime is 20157593. The next prime is 20157617. The reversal of 20157603 is 30675102.

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

It is not a de Polignac number, because 20157603 - 2⁴ = 20157587 is a prime.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (20157653) 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, 228 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (3363402).

Almost surely, 2^20157603 is an apocalyptic number.

20157603 is a deficient number, since it is larger than the sum of its proper divisors (6749613).

20157603 is a wasteful number, since it uses less digits than its factorization.

20157603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 20157603 is about 4489.7219290286. The cubic root of 20157603 is about 272.1528975646.

The spelling of 20157603 in words is "twenty million, one hundred fifty-seven thousand, six hundred three".