21715736652046 has 8 divisors (see below), whose sum is σ = 32632085419560. Its totient is φ = 10838374845528.

The previous prime is 21715736652017. The next prime is 21715736652053. The reversal of 21715736652046 is 64025663751712.

It is a happy number.

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

It is a super-2 number, since 2×21715736652046² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9746738856 + ... + 9746741083.

It is an arithmetic number, because the mean of its divisors is an integer number (4079010677445).

Almost surely, 2^{21715736652046} is an apocalyptic number.

21715736652046 is a deficient number, since it is larger than the sum of its proper divisors (10916348767514).

21715736652046 is a wasteful number, since it uses less digits than its factorization.

21715736652046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19493480498.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 21715736652046 in words is "twenty-one trillion, seven hundred fifteen billion, seven hundred thirty-six million, six hundred fifty-two thousand, forty-six".