21496604037599 has 4 divisors (see below), whose sum is σ = 21502227008736. Its totient is φ = 21490981066464.

The previous prime is 21496604037583. The next prime is 21496604037677. The reversal of 21496604037599 is 99573040669412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21496604037599 - 2⁴ = 21496604037583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21496604037299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2811479834 + ... + 2811487479.

It is an arithmetic number, because the mean of its divisors is an integer number (5375556752184).

Almost surely, 2^{21496604037599} is an apocalyptic number.

21496604037599 is a deficient number, since it is larger than the sum of its proper divisors (5622971137).

21496604037599 is an equidigital number, since it uses as much as digits as its factorization.

21496604037599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622971136.

The product of its (nonzero) digits is 88179840, while the sum is 65.

The spelling of 21496604037599 in words is "twenty-one trillion, four hundred ninety-six billion, six hundred four million, thirty-seven thousand, five hundred ninety-nine".