20408490934 has 16 divisors (see below), whose sum is σ = 33526337040. Its totient is φ = 9259653600.

The previous prime is 20408490931. The next prime is 20408491009. The reversal of 20408490934 is 43909480402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408490931) by changing a digit.

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, 6650517 + ... + 6653584.

It is an arithmetic number, because the mean of its divisors is an integer number (2095396065).

Almost surely, 2^20408490934 is an apocalyptic number.

20408490934 is a deficient number, since it is larger than the sum of its proper divisors (13117846106).

20408490934 is a wasteful number, since it uses less digits than its factorization.

20408490934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13304175.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 20408490934 in words is "twenty billion, four hundred eight million, four hundred ninety thousand, nine hundred thirty-four".