21148098815 has 8 divisors (see below), whose sum is σ = 25471364928. Its totient is φ = 16856048160.

The previous prime is 21148098799. The next prime is 21148098841. The reversal of 21148098815 is 51889084112.

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

It is not a de Polignac number, because 21148098815 - 2⁴ = 21148098799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21148098815.

It is a congruent number.

It is an unprimeable number.

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, 7802372 + ... + 7805081.

It is an arithmetic number, because the mean of its divisors is an integer number (3183920616).

Almost surely, 2^21148098815 is an apocalyptic number.

21148098815 is a deficient number, since it is larger than the sum of its proper divisors (4323266113).

21148098815 is a wasteful number, since it uses less digits than its factorization.

21148098815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15607729.

The product of its (nonzero) digits is 184320, while the sum is 47.

The spelling of 21148098815 in words is "twenty-one billion, one hundred forty-eight million, ninety-eight thousand, eight hundred fifteen".