21283458969 has 8 divisors (see below), whose sum is σ = 29871521440. Its totient is φ = 13442184576.

The previous prime is 21283458961. The next prime is 21283458971. The reversal of 21283458969 is 96985438212.

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

It is not a de Polignac number, because 21283458969 - 2³ = 21283458961 is a prime.

It is a super-2 number, since 2×21283458969² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 373394017 = 21283458969 / (2 + 1 + 2 + 8 + 3 + 4 + 5 + 8 + 9 + 6 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21283458961) 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, 186696952 + ... + 186697065.

It is an arithmetic number, because the mean of its divisors is an integer number (3733940180).

Almost surely, 2^21283458969 is an apocalyptic number.

It is an amenable number.

21283458969 is a deficient number, since it is larger than the sum of its proper divisors (8588062471).

21283458969 is a wasteful number, since it uses less digits than its factorization.

21283458969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373394039.

The product of its digits is 7464960, while the sum is 57.

The spelling of 21283458969 in words is "twenty-one billion, two hundred eighty-three million, four hundred fifty-eight thousand, nine hundred sixty-nine".