20204064240 has 160 divisors (see below), whose sum is σ = 63760490496. Its totient is φ = 5291596800.

The previous prime is 20204064233. The next prime is 20204064269. The reversal of 20204064240 is 4246040202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20204064240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3075199 + ... + 3081761.

Almost surely, 2^20204064240 is an apocalyptic number.

20204064240 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 20204064240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31880245248).

20204064240 is an abundant number, since it is smaller than the sum of its proper divisors (43556426256).

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

20204064240 is a wasteful number, since it uses less digits than its factorization.

20204064240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6807 (or 6801 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The spelling of 20204064240 in words is "twenty billion, two hundred four million, sixty-four thousand, two hundred forty".