20271602673221 has 16 divisors (see below), whose sum is σ = 20339719012800. Its totient is φ = 20203634169600.

The previous prime is 20271602673197. The next prime is 20271602673229. The reversal of 20271602673221 is 12237620617202.

It is a cyclic number.

It is not a de Polignac number, because 20271602673221 - 2¹⁸ = 20271602411077 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 (20271602673229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843969950 + ... + 843993968.

It is an arithmetic number, because the mean of its divisors is an integer number (1271232438300).

Almost surely, 2^{20271602673221} is an apocalyptic number.

It is an amenable number.

20271602673221 is a deficient number, since it is larger than the sum of its proper divisors (68116339579).

20271602673221 is a wasteful number, since it uses less digits than its factorization.

20271602673221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26980.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 20271602673221 in words is "twenty trillion, two hundred seventy-one billion, six hundred two million, six hundred seventy-three thousand, two hundred twenty-one".