20559337540 has 24 divisors (see below), whose sum is σ = 49342410432. Its totient is φ = 7048915680.

The previous prime is 20559337529. The next prime is 20559337559. The reversal of 20559337540 is 4573395502.

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, 73426066 + ... + 73426345.

It is an arithmetic number, because the mean of its divisors is an integer number (2055933768).

Almost surely, 2^20559337540 is an apocalyptic number.

20559337540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20559337540 is an abundant number, since it is smaller than the sum of its proper divisors (28783072892).

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

20559337540 is a wasteful number, since it uses less digits than its factorization.

20559337540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146852427 (or 146852425 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 43.

The spelling of 20559337540 in words is "twenty billion, five hundred fifty-nine million, three hundred thirty-seven thousand, five hundred forty".