21458246797 has 8 divisors (see below), whose sum is σ = 23144829344. Its totient is φ = 19776799728.

The previous prime is 21458246791. The next prime is 21458246813. The reversal of 21458246797 is 79764285412.

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-21458246797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21458246791) 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, 1275183 + ... + 1291900.

It is an arithmetic number, because the mean of its divisors is an integer number (2893103668).

Almost surely, 2^21458246797 is an apocalyptic number.

It is an amenable number.

21458246797 is a deficient number, since it is larger than the sum of its proper divisors (1686582547).

21458246797 is a wasteful number, since it uses less digits than its factorization.

21458246797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567739.

The product of its digits is 6773760, while the sum is 55.

The spelling of 21458246797 in words is "twenty-one billion, four hundred fifty-eight million, two hundred forty-six thousand, seven hundred ninety-seven".