20111000051 has 8 divisors (see below), whose sum is σ = 21317390784. Its totient is φ = 18907208320.

The previous prime is 20111000033. The next prime is 20111000057. The reversal of 20111000051 is 15000011102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20111000051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110999996 and 20111000041.

It is not an unprimeable number, because it can be changed into a prime (20111000057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633800 + ... + 664773.

It is an arithmetic number, because the mean of its divisors is an integer number (2664673848).

Almost surely, 2^20111000051 is an apocalyptic number.

20111000051 is a deficient number, since it is larger than the sum of its proper divisors (1206390733).

20111000051 is a wasteful number, since it uses less digits than its factorization.

20111000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299501.

The product of its (nonzero) digits is 10, while the sum is 11.

Adding to 20111000051 its reverse (15000011102), we get a palindrome (35111011153).

The spelling of 20111000051 in words is "twenty billion, one hundred eleven million, fifty-one", and thus it is an aban number.