21246598849 has 8 divisors (see below), whose sum is σ = 24283180800. Its totient is φ = 18210355296.

The previous prime is 21246598811. The next prime is 21246598873. The reversal of 21246598849 is 94889564212.

It is a happy number.

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

It is not a de Polignac number, because 21246598849 - 2¹⁷ = 21246467777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21246598793 and 21246598802.

It is not an unprimeable number, because it can be changed into a prime (21246598049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68397 + ... + 217189.

It is an arithmetic number, because the mean of its divisors is an integer number (3035397600).

Almost surely, 2^21246598849 is an apocalyptic number.

It is an amenable number.

21246598849 is a deficient number, since it is larger than the sum of its proper divisors (3036581951).

21246598849 is a wasteful number, since it uses less digits than its factorization.

21246598849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169199.

The product of its digits is 9953280, while the sum is 58.

The spelling of 21246598849 in words is "twenty-one billion, two hundred forty-six million, five hundred ninety-eight thousand, eight hundred forty-nine".