20540040354 has 24 divisors (see below), whose sum is σ = 45588871692. Its totient is φ = 6679687680.

The previous prime is 20540040341. The next prime is 20540040377. The reversal of 20540040354 is 45304004502.

20540040354 is a `hidden beast` number, since 205 + 4 + 0 + 0 + 403 + 54 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19969929225 + 570111129 = 141315^2 + 23877^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13915279 + ... + 13916754.

Almost surely, 2^20540040354 is an apocalyptic number.

20540040354 is an abundant number, since it is smaller than the sum of its proper divisors (25048831338).

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

20540040354 is a wasteful number, since it uses less digits than its factorization.

20540040354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27832082 (or 27832079 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 20540040354 its reverse (45304004502), we get a palindrome (65844044856).

The spelling of 20540040354 in words is "twenty billion, five hundred forty million, forty thousand, three hundred fifty-four".