20914285921775 has 24 divisors (see below), whose sum is σ = 25947016740000. Its totient is φ = 16722848796800.

The previous prime is 20914285921769. The next prime is 20914285921909. The reversal of 20914285921775 is 57712958241902.

It is a happy number.

It is not a de Polignac number, because 20914285921775 - 2²⁶ = 20914218812911 is a prime.

It is a super-2 number, since 2×20914285921775² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 478993445 + ... + 479037105.

It is an arithmetic number, because the mean of its divisors is an integer number (1081125697500).

Almost surely, 2^{20914285921775} is an apocalyptic number.

20914285921775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20914285921775 is a deficient number, since it is larger than the sum of its proper divisors (5032730818225).

20914285921775 is a wasteful number, since it uses less digits than its factorization.

20914285921775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53059 (or 53054 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 62.

The spelling of 20914285921775 in words is "twenty trillion, nine hundred fourteen billion, two hundred eighty-five million, nine hundred twenty-one thousand, seven hundred seventy-five".