20355205404 has 24 divisors (see below), whose sum is σ = 47708469760. Its totient is φ = 6754641264.

The previous prime is 20355205369. The next prime is 20355205417. The reversal of 20355205404 is 40450255302.

It is a congruent number.

It is an unprimeable number.

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, 3800614 + ... + 3805965.

Almost surely, 2^20355205404 is an apocalyptic number.

It is an amenable number.

20355205404 is an abundant number, since it is smaller than the sum of its proper divisors (27353264356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20355205404 is a wasteful number, since it uses less digits than its factorization.

20355205404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7606809 (or 7606807 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

The spelling of 20355205404 in words is "twenty billion, three hundred fifty-five million, two hundred five thousand, four hundred four".