20124011 has 4 divisors (see below), whose sum is σ = 20998992. Its totient is φ = 19249032.

The previous prime is 20124007. The next prime is 20124023. The reversal of 20124011 is 11042102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11042102 = 2 ⋅5521051.

It is a cyclic number.

It is not a de Polignac number, because 20124011 - 2² = 20124007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123983 and 20124001.

It is not an unprimeable number, because it can be changed into a prime (20124031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437456 + ... + 437501.

It is an arithmetic number, because the mean of its divisors is an integer number (5249748).

Almost surely, 2^20124011 is an apocalyptic number.

20124011 is a deficient number, since it is larger than the sum of its proper divisors (874981).

20124011 is an equidigital number, since it uses as much as digits as its factorization.

20124011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874980.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 20124011 is about 4485.9793802469. The cubic root of 20124011 is about 272.0016354789.

Adding to 20124011 its reverse (11042102), we get a palindrome (31166113).

The spelling of 20124011 in words is "twenty million, one hundred twenty-four thousand, eleven".