20550456154 has 32 divisors (see below), whose sum is σ = 33140250576. Its totient is φ = 9522708480.

The previous prime is 20550456149. The next prime is 20550456167. The reversal of 20550456154 is 45165405502.

It can be written as a sum of positive squares in 8 ways, for example, as 18185871025 + 2364585129 = 134855^2 + 48627^2 .

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 15 ways as a sum of consecutive naturals, for example, 1584504 + ... + 1597420.

Almost surely, 2^20550456154 is an apocalyptic number.

20550456154 is a deficient number, since it is larger than the sum of its proper divisors (12589794422).

20550456154 is a wasteful number, since it uses less digits than its factorization.

20550456154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13650.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 20550456154 in words is "twenty billion, five hundred fifty million, four hundred fifty-six thousand, one hundred fifty-four".