20578703040 has 336 divisors, whose sum is σ = 81251389440. Its totient is φ = 4682926080.

The previous prime is 20578703029. The next prime is 20578703077. The reversal of 20578703040 is 4030787502.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20578702986 and 20578703004.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4816105 + ... + 4820375.

Almost surely, 2^20578703040 is an apocalyptic number.

20578703040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20578703040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40625694720).

20578703040 is an abundant number, since it is smaller than the sum of its proper divisors (60672686400).

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

20578703040 is a wasteful number, since it uses less digits than its factorization.

20578703040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540 (or 4527 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 20578703040 in words is "twenty billion, five hundred seventy-eight million, seven hundred three thousand, forty".