21682526465 has 8 divisors (see below), whose sum is σ = 26077768128. Its totient is φ = 17306863600.

The previous prime is 21682526431. The next prime is 21682526501. The reversal of 21682526465 is 56462528612.

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

It is not a de Polignac number, because 21682526465 - 2⁶ = 21682526401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4892261 + ... + 4896690.

It is an arithmetic number, because the mean of its divisors is an integer number (3259721016).

Almost surely, 2^21682526465 is an apocalyptic number.

It is an amenable number.

21682526465 is a deficient number, since it is larger than the sum of its proper divisors (4395241663).

21682526465 is an equidigital number, since it uses as much as digits as its factorization.

21682526465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9789399.

The product of its digits is 1382400, while the sum is 47.

The spelling of 21682526465 in words is "twenty-one billion, six hundred eighty-two million, five hundred twenty-six thousand, four hundred sixty-five".