20346440255 has 4 divisors (see below), whose sum is σ = 24415728312. Its totient is φ = 16277152200.

The previous prime is 20346440227. The next prime is 20346440269. The reversal of 20346440255 is 55204464302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20346440255 - 2²⁸ = 20078004799 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 2034644021 + ... + 2034644030.

It is an arithmetic number, because the mean of its divisors is an integer number (6103932078).

Almost surely, 2^20346440255 is an apocalyptic number.

20346440255 is a deficient number, since it is larger than the sum of its proper divisors (4069288057).

20346440255 is an equidigital number, since it uses as much as digits as its factorization.

20346440255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069288056.

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 20346440255 in words is "twenty billion, three hundred forty-six million, four hundred forty thousand, two hundred fifty-five".