20736123 has 8 divisors (see below), whose sum is σ = 27690000. Its totient is φ = 13803168.

The previous prime is 20736109. The next prime is 20736137. The reversal of 20736123 is 32163702.

It is an interprime number because it is at equal distance from previous prime (20736109) and next prime (20736137).

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

It is not a de Polignac number, because 20736123 - 2⁶ = 20736059 is a prime.

It is a super-2 number, since 2×20736123² = 859973594142258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20736093 and 20736102.

It is not an unprimeable number, because it can be changed into a prime (20736103) 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, 2748 + ... + 7001.

It is an arithmetic number, because the mean of its divisors is an integer number (3461250).

Almost surely, 2^20736123 is an apocalyptic number.

20736123 is a deficient number, since it is larger than the sum of its proper divisors (6953877).

20736123 is an equidigital number, since it uses as much as digits as its factorization.

20736123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10461.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 20736123 is about 4553.6933361833. The cubic root of 20736123 is about 274.7319614210.

Adding to 20736123 its reverse (32163702), we get a palindrome (52899825).

The spelling of 20736123 in words is "twenty million, seven hundred thirty-six thousand, one hundred twenty-three".