21492841364 has 6 divisors (see below), whose sum is σ = 37612472394. Its totient is φ = 10746420680.

The previous prime is 21492841361. The next prime is 21492841367. The reversal of 21492841364 is 46314829412.

It is an interprime number because it is at equal distance from previous prime (21492841361) and next prime (21492841367).

It can be written as a sum of positive squares in only one way, i.e., 21403690000 + 89151364 = 146300^2 + 9442^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21492841361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2686605167 + ... + 2686605174.

It is an arithmetic number, because the mean of its divisors is an integer number (6268745399).

Almost surely, 2^21492841364 is an apocalyptic number.

It is an amenable number.

21492841364 is a deficient number, since it is larger than the sum of its proper divisors (16119631030).

21492841364 is a wasteful number, since it uses less digits than its factorization.

21492841364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373210345 (or 5373210343 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The spelling of 21492841364 in words is "twenty-one billion, four hundred ninety-two million, eight hundred forty-one thousand, three hundred sixty-four".