21492148859 has 2 divisors, whose sum is σ = 21492148860. Its totient is φ = 21492148858.

The previous prime is 21492148829. The next prime is 21492148871. The reversal of 21492148859 is 95884129412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21492148859 - 2¹² = 21492144763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21492148859.

It is not a weakly prime, because it can be changed into another prime (21492148829) 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, 10746074429 + 10746074430.

It is an arithmetic number, because the mean of its divisors is an integer number (10746074430).

Almost surely, 2^21492148859 is an apocalyptic number.

21492148859 is a deficient number, since it is larger than the sum of its proper divisors (1).

21492148859 is an equidigital number, since it uses as much as digits as its factorization.

21492148859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 53.

The spelling of 21492148859 in words is "twenty-one billion, four hundred ninety-two million, one hundred forty-eight thousand, eight hundred fifty-nine".