21715694304746 has 16 divisors (see below), whose sum is σ = 35894993807904. Its totient is φ = 9789543764784.

The previous prime is 21715694304721. The next prime is 21715694304751. The reversal of 21715694304746 is 64740349651712.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9711847856 + ... + 9711850091.

It is an arithmetic number, because the mean of its divisors is an integer number (2243437112994).

Almost surely, 2^{21715694304746} is an apocalyptic number.

21715694304746 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21715694304746 is a deficient number, since it is larger than the sum of its proper divisors (14179299503158).

21715694304746 is a wasteful number, since it uses less digits than its factorization.

21715694304746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19423698005.

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 21715694304746 in words is "twenty-one trillion, seven hundred fifteen billion, six hundred ninety-four million, three hundred four thousand, seven hundred forty-six".