20112311451 has 16 divisors (see below), whose sum is σ = 27225676800. Its totient is φ = 13203709728.

The previous prime is 20112311447. The next prime is 20112311489. The reversal of 20112311451 is 15411321102.

It is not a de Polignac number, because 20112311451 - 2² = 20112311447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112311551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660265 + ... + 690053.

It is an arithmetic number, because the mean of its divisors is an integer number (1701604800).

Almost surely, 2^20112311451 is an apocalyptic number.

20112311451 is a deficient number, since it is larger than the sum of its proper divisors (7113365349).

20112311451 is a wasteful number, since it uses less digits than its factorization.

20112311451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33218.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 20112311451 its reverse (15411321102), we get a palindrome (35523632553).

The spelling of 20112311451 in words is "twenty billion, one hundred twelve million, three hundred eleven thousand, four hundred fifty-one".