20113124551 has 16 divisors (see below), whose sum is σ = 22427112960. Its totient is φ = 17909821440.

The previous prime is 20113124501. The next prime is 20113124573. The reversal of 20113124551 is 15542131102.

It is a cyclic number.

It is not a de Polignac number, because 20113124551 - 2¹¹ = 20113122503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113124501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411546 + ... + 457816.

It is an arithmetic number, because the mean of its divisors is an integer number (1401694560).

Almost surely, 2^20113124551 is an apocalyptic number.

20113124551 is a deficient number, since it is larger than the sum of its proper divisors (2313988409).

20113124551 is a wasteful number, since it uses less digits than its factorization.

20113124551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47466.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 20113124551 its reverse (15542131102), we get a palindrome (35655255653).

The spelling of 20113124551 in words is "twenty billion, one hundred thirteen million, one hundred twenty-four thousand, five hundred fifty-one".