20400594271 has 4 divisors (see below), whose sum is σ = 20400883000. Its totient is φ = 20400305544.

The previous prime is 20400594241. The next prime is 20400594283. The reversal of 20400594271 is 17249500402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20400594271 - 2¹⁹ = 20400069983 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 (20400594241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40705 + ... + 206053.

It is an arithmetic number, because the mean of its divisors is an integer number (5100220750).

Almost surely, 2^20400594271 is an apocalyptic number.

20400594271 is a deficient number, since it is larger than the sum of its proper divisors (288729).

20400594271 is a wasteful number, since it uses less digits than its factorization.

20400594271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288728.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 20400594271 in words is "twenty billion, four hundred million, five hundred ninety-four thousand, two hundred seventy-one".