20256904353 has 32 divisors (see below), whose sum is σ = 32697388800. Its totient is φ = 10889809920.

The previous prime is 20256904351. The next prime is 20256904403. The reversal of 20256904353 is 35340965202.

It is not a de Polignac number, because 20256904353 - 2¹ = 20256904351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20256904351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 924873 + ... + 946521.

It is an arithmetic number, because the mean of its divisors is an integer number (1021793400).

Almost surely, 2^20256904353 is an apocalyptic number.

It is an amenable number.

20256904353 is a deficient number, since it is larger than the sum of its proper divisors (12440484447).

20256904353 is a wasteful number, since it uses less digits than its factorization.

20256904353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24297.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 20256904353 in words is "twenty billion, two hundred fifty-six million, nine hundred four thousand, three hundred fifty-three".