20724126 has 8 divisors (see below), whose sum is σ = 41448264. Its totient is φ = 6908040.

The previous prime is 20724097. The next prime is 20724161. The reversal of 20724126 is 62142702.

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

20724126 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20724096 and 20724105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1727005 + ... + 1727016.

It is an arithmetic number, because the mean of its divisors is an integer number (5181033).

Almost surely, 2^20724126 is an apocalyptic number.

20724126 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20724126 is a wasteful number, since it uses less digits than its factorization.

20724126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454026.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20724126 is about 4552.3758632169. The cubic root of 20724126 is about 274.6789686287.

Adding to 20724126 its reverse (62142702), we get a palindrome (82866828).

The spelling of 20724126 in words is "twenty million, seven hundred twenty-four thousand, one hundred twenty-six".