20851795464207 has 8 divisors (see below), whose sum is σ = 27810205822080. Its totient is φ = 13897291041240.

The previous prime is 20851795464169. The next prime is 20851795464233. The reversal of 20851795464207 is 70246459715802.

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

It is not a de Polignac number, because 20851795464207 - 2¹⁶ = 20851795398671 is a prime.

It is a super-2 number, since 2×20851795464207² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20851795460207) 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, 976471269 + ... + 976492622.

It is an arithmetic number, because the mean of its divisors is an integer number (3476275727760).

Almost surely, 2^{20851795464207} is an apocalyptic number.

20851795464207 is a deficient number, since it is larger than the sum of its proper divisors (6958410357873).

20851795464207 is a wasteful number, since it uses less digits than its factorization.

20851795464207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952967453.

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 20851795464207 in words is "twenty trillion, eight hundred fifty-one billion, seven hundred ninety-five million, four hundred sixty-four thousand, two hundred seven".