21149068893 has 8 divisors (see below), whose sum is σ = 28207283328. Its totient is φ = 14095116864.

The previous prime is 21149068861. The next prime is 21149068921. The reversal of 21149068893 is 39886094112.

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

It is not a de Polignac number, because 21149068893 - 2⁵ = 21149068861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21149068823) 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, 1054005 + ... + 1073882.

It is an arithmetic number, because the mean of its divisors is an integer number (3525910416).

Almost surely, 2^21149068893 is an apocalyptic number.

It is an amenable number.

21149068893 is a deficient number, since it is larger than the sum of its proper divisors (7058214435).

21149068893 is a wasteful number, since it uses less digits than its factorization.

21149068893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131203.

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 21149068893 in words is "twenty-one billion, one hundred forty-nine million, sixty-eight thousand, eight hundred ninety-three".