20593499940 has 120 divisors (see below), whose sum is σ = 69572071800. Its totient is φ = 5069164032.

The previous prime is 20593499911. The next prime is 20593499987. The reversal of 20593499940 is 4999439502.

20593499940 is a `hidden beast` number, since 2 + 0 + 593 + 4 + 9 + 9 + 9 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 840884004 + 19752615936 = 28998^2 + 140544^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 467865 + ... + 509984.

It is an arithmetic number, because the mean of its divisors is an integer number (579767265).

Almost surely, 2^20593499940 is an apocalyptic number.

20593499940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20593499940 is an abundant number, since it is smaller than the sum of its proper divisors (48978571860).

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

20593499940 is a wasteful number, since it uses less digits than its factorization.

20593499940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977883 (or 977872 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 20593499940 in words is "twenty billion, five hundred ninety-three million, four hundred ninety-nine thousand, nine hundred forty".