20403402205 has 16 divisors (see below), whose sum is σ = 24665969664. Its totient is φ = 16201912000.

The previous prime is 20403402203. The next prime is 20403402223. The reversal of 20403402205 is 50220430402.

It is not a de Polignac number, because 20403402205 - 2¹ = 20403402203 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 (20403402203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339972 + ... + 395458.

It is an arithmetic number, because the mean of its divisors is an integer number (1541623104).

Almost surely, 2^20403402205 is an apocalyptic number.

It is an amenable number.

20403402205 is a deficient number, since it is larger than the sum of its proper divisors (4262567459).

20403402205 is a wasteful number, since it uses less digits than its factorization.

20403402205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56036.

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 20403402205 its reverse (50220430402), we get a palindrome (70623832607).

The spelling of 20403402205 in words is "twenty billion, four hundred three million, four hundred two thousand, two hundred five".