20124004011 has 4 divisors (see below), whose sum is σ = 26832005352. Its totient is φ = 13416002672.

The previous prime is 20124004009. The next prime is 20124004049. The reversal of 20124004011 is 11040042102.

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 20124004011 - 2¹ = 20124004009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20124004081) 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, 3354000666 + ... + 3354000671.

It is an arithmetic number, because the mean of its divisors is an integer number (6708001338).

Almost surely, 2^20124004011 is an apocalyptic number.

20124004011 is a deficient number, since it is larger than the sum of its proper divisors (6708001341).

20124004011 is an equidigital number, since it uses as much as digits as its factorization.

20124004011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6708001340.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20124004011 its reverse (11040042102), we get a palindrome (31164046113).

The spelling of 20124004011 in words is "twenty billion, one hundred twenty-four million, four thousand, eleven".