21860340569 has 8 divisors (see below), whose sum is σ = 21948905088. Its totient is φ = 21771846000.

The previous prime is 21860340553. The next prime is 21860340589. The reversal of 21860340569 is 96504306812.

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 21860340569 - 2⁴ = 21860340553 is a prime.

It is a super-2 number, since 2×21860340569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21860340529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661694 + ... + 693944.

It is an arithmetic number, because the mean of its divisors is an integer number (2743613136).

Almost surely, 2^21860340569 is an apocalyptic number.

It is an amenable number.

21860340569 is a deficient number, since it is larger than the sum of its proper divisors (88564519).

21860340569 is a wasteful number, since it uses less digits than its factorization.

21860340569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34975.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 21860340569 in words is "twenty-one billion, eight hundred sixty million, three hundred forty thousand, five hundred sixty-nine".