20041171651 has 2 divisors, whose sum is σ = 20041171652. Its totient is φ = 20041171650.

The previous prime is 20041171547. The next prime is 20041171681. The reversal of 20041171651 is 15617114002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20041171651 - 2²¹ = 20039074499 is a prime.

It is a super-2 number, since 2×20041171651² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20041171681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020585825 + 10020585826.

It is an arithmetic number, because the mean of its divisors is an integer number (10020585826).

Almost surely, 2^20041171651 is an apocalyptic number.

20041171651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041171651 is an equidigital number, since it uses as much as digits as its factorization.

20041171651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 20041171651 its reverse (15617114002), we get a palindrome (35658285653).

The spelling of 20041171651 in words is "twenty billion, forty-one million, one hundred seventy-one thousand, six hundred fifty-one".