20566026404 has 24 divisors (see below), whose sum is σ = 44871331008. Its totient is φ = 8012737440.

The previous prime is 20566026343. The next prime is 20566026497. The reversal of 20566026404 is 40462066502.

It is a super-2 number, since 2×20566026404² (a number of 21 digits) contains 22 as substring.

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, 33386099 + ... + 33386714.

It is an arithmetic number, because the mean of its divisors is an integer number (1869638792).

Almost surely, 2^20566026404 is an apocalyptic number.

It is an amenable number.

20566026404 is an abundant number, since it is smaller than the sum of its proper divisors (24305304604).

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

20566026404 is a wasteful number, since it uses less digits than its factorization.

20566026404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66772835 (or 66772833 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20566026404 in words is "twenty billion, five hundred sixty-six million, twenty-six thousand, four hundred four".