21360250097 has 8 divisors (see below), whose sum is σ = 21400750272. Its totient is φ = 21319786800.

The previous prime is 21360250057. The next prime is 21360250123. The reversal of 21360250097 is 79005206312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21360250097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21360250057) 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 7 ways as a sum of consecutive naturals, for example, 1327772 + ... + 1343762.

It is an arithmetic number, because the mean of its divisors is an integer number (2675093784).

Almost surely, 2^21360250097 is an apocalyptic number.

It is an amenable number.

21360250097 is a deficient number, since it is larger than the sum of its proper divisors (40500175).

21360250097 is a wasteful number, since it uses less digits than its factorization.

21360250097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18439.

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 21360250097 in words is "twenty-one billion, three hundred sixty million, two hundred fifty thousand, ninety-seven".