20400002255 has 4 divisors (see below), whose sum is σ = 24480002712. Its totient is φ = 16320001800.

The previous prime is 20400002171. The next prime is 20400002269. The reversal of 20400002255 is 55220000402.

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

It is a de Polignac number, because none of the positive numbers 2^k-20400002255 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, 2040000221 + ... + 2040000230.

It is an arithmetic number, because the mean of its divisors is an integer number (6120000678).

Almost surely, 2^20400002255 is an apocalyptic number.

20400002255 is a deficient number, since it is larger than the sum of its proper divisors (4080000457).

20400002255 is an equidigital number, since it uses as much as digits as its factorization.

20400002255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080000456.

The product of its (nonzero) digits is 800, while the sum is 20.

Adding to 20400002255 its reverse (55220000402), we get a palindrome (75620002657).

The spelling of 20400002255 in words is "twenty billion, four hundred million, two thousand, two hundred fifty-five".