21715126342994 has 16 divisors (see below), whose sum is σ = 37836192037056. Its totient is φ = 9153917427600.

The previous prime is 21715126342969. The next prime is 21715126343017. The reversal of 21715126342994 is 49924362151712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12713773352 + ... + 12713775059.

It is an arithmetic number, because the mean of its divisors is an integer number (2364762002316).

Almost surely, 2^{21715126342994} is an apocalyptic number.

21715126342994 is a deficient number, since it is larger than the sum of its proper divisors (16121065694062).

21715126342994 is a wasteful number, since it uses less digits than its factorization.

21715126342994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25427548481.

The product of its digits is 6531840, while the sum is 56.

The spelling of 21715126342994 in words is "twenty-one trillion, seven hundred fifteen billion, one hundred twenty-six million, three hundred forty-two thousand, nine hundred ninety-four".