21969931489 has 8 divisors (see below), whose sum is σ = 24022811520. Its totient is φ = 19926320400.

The previous prime is 21969931469. The next prime is 21969931519. The reversal of 21969931489 is 98413996912.

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 21969931489 - 2¹¹ = 21969929441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21969931469) 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, 2312274 + ... + 2321755.

It is an arithmetic number, because the mean of its divisors is an integer number (3002851440).

Almost surely, 2^21969931489 is an apocalyptic number.

It is an amenable number.

21969931489 is a deficient number, since it is larger than the sum of its proper divisors (2052880031).

21969931489 is a wasteful number, since it uses less digits than its factorization.

21969931489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4634471.

The product of its digits is 7558272, while the sum is 61.

The spelling of 21969931489 in words is "twenty-one billion, nine hundred sixty-nine million, nine hundred thirty-one thousand, four hundred eighty-nine".