20051451011 has 2 divisors, whose sum is σ = 20051451012. Its totient is φ = 20051451010.

The previous prime is 20051450983. The next prime is 20051451209. The reversal of 20051451011 is 11015415002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20051451011 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20051451311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025725505 + 10025725506.

It is an arithmetic number, because the mean of its divisors is an integer number (10025725506).

Almost surely, 2^20051451011 is an apocalyptic number.

20051451011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20051451011 is an equidigital number, since it uses as much as digits as its factorization.

20051451011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 20051451011 its reverse (11015415002), we get a palindrome (31066866013).

The spelling of 20051451011 in words is "twenty billion, fifty-one million, four hundred fifty-one thousand, eleven".