20271572006405 has 8 divisors (see below), whose sum is σ = 24688959339552. Its totient is φ = 15975208983888.

The previous prime is 20271572006381. The next prime is 20271572006419. The reversal of 20271572006405 is 50460027517202.

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 20271572006405 - 2¹² = 20271572002309 is a prime.

It is a super-2 number, since 2×20271572006405² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 30256077287 + ... + 30256077956.

It is an arithmetic number, because the mean of its divisors is an integer number (3086119917444).

Almost surely, 2^{20271572006405} is an apocalyptic number.

It is an amenable number.

20271572006405 is a deficient number, since it is larger than the sum of its proper divisors (4417387333147).

20271572006405 is an equidigital number, since it uses as much as digits as its factorization.

20271572006405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60512155315.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 20271572006405 in words is "twenty trillion, two hundred seventy-one billion, five hundred seventy-two million, six thousand, four hundred five".