20500123 has 8 divisors (see below), whose sum is σ = 24000480. Its totient is φ = 17142720.

The previous prime is 20500097. The next prime is 20500159. The reversal of 20500123 is 32100502.

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

It is not a de Polignac number, because 20500123 - 2⁵ = 20500091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20500163) 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, 35428 + ... + 36001.

It is an arithmetic number, because the mean of its divisors is an integer number (3000060).

Almost surely, 2^20500123 is an apocalyptic number.

20500123 is a deficient number, since it is larger than the sum of its proper divisors (3500357).

20500123 is an equidigital number, since it uses as much as digits as its factorization.

20500123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71477.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20500123 is about 4527.7061521260. The cubic root of 20500123 is about 273.6857311092.

Adding to 20500123 its reverse (32100502), we get a palindrome (52600625).

The spelling of 20500123 in words is "twenty million, five hundred thousand, one hundred twenty-three".