20124424211 has 4 divisors (see below), whose sum is σ = 20165747952. Its totient is φ = 20083100472.

The previous prime is 20124424193. The next prime is 20124424231. The reversal of 20124424211 is 11242442102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20124424211 - 2⁶ = 20124424147 is a prime.

It is a super-4 number, since 4×20124424211⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124424231) 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, 20661140 + ... + 20662113.

It is an arithmetic number, because the mean of its divisors is an integer number (5041436988).

Almost surely, 2^20124424211 is an apocalyptic number.

20124424211 is a deficient number, since it is larger than the sum of its proper divisors (41323741).

20124424211 is an equidigital number, since it uses as much as digits as its factorization.

20124424211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41323740.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 20124424211 its reverse (11242442102), we get a palindrome (31366866313).

The spelling of 20124424211 in words is "twenty billion, one hundred twenty-four million, four hundred twenty-four thousand, two hundred eleven".