20400550005 has 32 divisors (see below), whose sum is σ = 37156423680. Its totient is φ = 9461122880.

The previous prime is 20400550003. The next prime is 20400550019. The reversal of 20400550005 is 50005500402.

It is not a de Polignac number, because 20400550005 - 2¹ = 20400550003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400550003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2684025 + ... + 2691614.

It is an arithmetic number, because the mean of its divisors is an integer number (1161138240).

Almost surely, 2^20400550005 is an apocalyptic number.

It is an amenable number.

20400550005 is a deficient number, since it is larger than the sum of its proper divisors (16755873675).

20400550005 is a wasteful number, since it uses less digits than its factorization.

20400550005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5375681.

The product of its (nonzero) digits is 1000, while the sum is 21.

The spelling of 20400550005 in words is "twenty billion, four hundred million, five hundred fifty thousand, five".