19427660020 has 24 divisors (see below), whose sum is σ = 41071905000. Its totient is φ = 7718908032.

The previous prime is 19427660003. The next prime is 19427660039. The reversal of 19427660020 is 2006672491.

It can be written as a sum of positive squares in 4 ways, for example, as 318096 + 19427341924 = 564^2 + 139382^2 .

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3256695 + ... + 3262654.

It is an arithmetic number, because the mean of its divisors is an integer number (1711329375).

Almost surely, 2^19427660020 is an apocalyptic number.

19427660020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19427660020 is an abundant number, since it is smaller than the sum of its proper divisors (21644244980).

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

19427660020 is a wasteful number, since it uses less digits than its factorization.

19427660020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6519507 (or 6519505 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 19427660020 in words is "nineteen billion, four hundred twenty-seven million, six hundred sixty thousand, twenty".