20526516478 has 16 divisors (see below), whose sum is σ = 33419312640. Its totient is φ = 9399178656.

The previous prime is 20526516407. The next prime is 20526516503. The reversal of 20526516478 is 87461562502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3104893 + ... + 3111496.

It is an arithmetic number, because the mean of its divisors is an integer number (2088707040).

Almost surely, 2^20526516478 is an apocalyptic number.

20526516478 is a deficient number, since it is larger than the sum of its proper divisors (12892796162).

20526516478 is a wasteful number, since it uses less digits than its factorization.

20526516478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216531.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 20526516478 in words is "twenty billion, five hundred twenty-six million, five hundred sixteen thousand, four hundred seventy-eight".