20015327572721 has 8 divisors (see below), whose sum is σ = 21858559257024. Its totient is φ = 18215466045840.

The previous prime is 20015327572693. The next prime is 20015327572733. The reversal of 20015327572721 is 12727572351002.

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

It is a cyclic number.

It is not a de Polignac number, because 20015327572721 - 2¹⁴ = 20015327556337 is a prime.

It is a super-2 number, since 2×20015327572721² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20015327572781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10842538391 + ... + 10842540236.

It is an arithmetic number, because the mean of its divisors is an integer number (2732319907128).

Almost surely, 2^{20015327572721} is an apocalyptic number.

It is an amenable number.

20015327572721 is a deficient number, since it is larger than the sum of its proper divisors (1843231684303).

20015327572721 is a wasteful number, since it uses less digits than its factorization.

20015327572721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21685078711.

The product of its (nonzero) digits is 411600, while the sum is 44.

The spelling of 20015327572721 in words is "twenty trillion, fifteen billion, three hundred twenty-seven million, five hundred seventy-two thousand, seven hundred twenty-one".