21489067611 has 42 divisors (see below), whose sum is σ = 35169334212. Its totient is φ = 13015721520.

The previous prime is 21489067571. The next prime is 21489067619. The reversal of 21489067611 is 11676098412.

21489067611 is a `hidden beast` number, since 21 + 4 + 8 + 9 + 0 + 6 + 7 + 611 = 666.

It is not a de Polignac number, because 21489067611 - 2¹³ = 21489059419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21489067619) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 13126285 + ... + 13127921.

Almost surely, 2^21489067611 is an apocalyptic number.

21489067611 is a deficient number, since it is larger than the sum of its proper divisors (13680266601).

21489067611 is an frugal number, since it uses more digits than its factorization.

21489067611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 21489067611 in words is "twenty-one billion, four hundred eighty-nine million, sixty-seven thousand, six hundred eleven".