20540209395 has 8 divisors (see below), whose sum is σ = 32864335056. Its totient is φ = 10954778336.

The previous prime is 20540209343. The next prime is 20540209399. The reversal of 20540209395 is 59390204502.

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 20540209395 - 2²⁵ = 20506654963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20540209399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684673632 + ... + 684673661.

It is an arithmetic number, because the mean of its divisors is an integer number (4108041882).

Almost surely, 2^20540209395 is an apocalyptic number.

20540209395 is a deficient number, since it is larger than the sum of its proper divisors (12324125661).

20540209395 is a wasteful number, since it uses less digits than its factorization.

20540209395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369347301.

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 20540209395 in words is "twenty billion, five hundred forty million, two hundred nine thousand, three hundred ninety-five".