20606605504 has 28 divisors (see below), whose sum is σ = 41312804344. Its totient is φ = 10197080064.

The previous prime is 20606605501. The next prime is 20606605507. The reversal of 20606605504 is 40550660602.

It is an interprime number because it is at equal distance from previous prime (20606605501) and next prime (20606605507).

It is a self number, because there is not a number n which added to its sum of digits gives 20606605504.

It is not an unprimeable number, because it can be changed into a prime (20606605501) 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 3 ways as a sum of consecutive naturals, for example, 1653474 + ... + 1665889.

It is an arithmetic number, because the mean of its divisors is an integer number (1475457298).

Almost surely, 2^20606605504 is an apocalyptic number.

It is an amenable number.

20606605504 is an abundant number, since it is smaller than the sum of its proper divisors (20706198840).

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

20606605504 is an equidigital number, since it uses as much as digits as its factorization.

20606605504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319472 (or 3319462 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 20606605504 in words is "twenty billion, six hundred six million, six hundred five thousand, five hundred four".