21404143151 has 2 divisors, whose sum is σ = 21404143152. Its totient is φ = 21404143150.

The previous prime is 21404143139. The next prime is 21404143171. The reversal of 21404143151 is 15134140412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21404143151 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21404143151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21404143171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10702071575 + 10702071576.

It is an arithmetic number, because the mean of its divisors is an integer number (10702071576).

Almost surely, 2^21404143151 is an apocalyptic number.

21404143151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21404143151 is an equidigital number, since it uses as much as digits as its factorization.

21404143151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 21404143151 its reverse (15134140412), we get a palindrome (36538283563).

The spelling of 21404143151 in words is "twenty-one billion, four hundred four million, one hundred forty-three thousand, one hundred fifty-one".