21098046189 has 8 divisors (see below), whose sum is σ = 30688067232. Its totient is φ = 12786694640.

The previous prime is 21098046187. The next prime is 21098046241. The reversal of 21098046189 is 98164089012.

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

It is a cyclic number.

It is not a de Polignac number, because 21098046189 - 2¹ = 21098046187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21098046187) 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, 319667334 + ... + 319667399.

It is an arithmetic number, because the mean of its divisors is an integer number (3836008404).

Almost surely, 2^21098046189 is an apocalyptic number.

It is an amenable number.

21098046189 is a deficient number, since it is larger than the sum of its proper divisors (9590021043).

21098046189 is a wasteful number, since it uses less digits than its factorization.

21098046189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639334747.

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 21098046189 in words is "twenty-one billion, ninety-eight million, forty-six thousand, one hundred eighty-nine".