21082774659 has 8 divisors (see below), whose sum is σ = 28368259920. Its totient is φ = 13926236256.

The previous prime is 21082774649. The next prime is 21082774667. The reversal of 21082774659 is 95647728012.

It is a happy number.

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

It is not a de Polignac number, because 21082774659 - 2⁵ = 21082774627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21082774649) 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, 32236332 + ... + 32236985.

It is an arithmetic number, because the mean of its divisors is an integer number (3546032490).

Almost surely, 2^21082774659 is an apocalyptic number.

21082774659 is a deficient number, since it is larger than the sum of its proper divisors (7285485261).

21082774659 is a wasteful number, since it uses less digits than its factorization.

21082774659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64473429.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 21082774659 in words is "twenty-one billion, eighty-two million, seven hundred seventy-four thousand, six hundred fifty-nine".