21426014161 has 4 divisors (see below), whose sum is σ = 21626257392. Its totient is φ = 21225770932.

The previous prime is 21426014147. The next prime is 21426014191. The reversal of 21426014161 is 16141062412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21426014161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21426014111) 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 3 ways as a sum of consecutive naturals, for example, 100121455 + ... + 100121668.

It is an arithmetic number, because the mean of its divisors is an integer number (5406564348).

Almost surely, 2^21426014161 is an apocalyptic number.

It is an amenable number.

21426014161 is a deficient number, since it is larger than the sum of its proper divisors (200243231).

21426014161 is a wasteful number, since it uses less digits than its factorization.

21426014161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200243230.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 21426014161 its reverse (16141062412), we get a palindrome (37567076573).

The spelling of 21426014161 in words is "twenty-one billion, four hundred twenty-six million, fourteen thousand, one hundred sixty-one".