20363840240 has 40 divisors (see below), whose sum is σ = 48447004848. Its totient is φ = 7956103680.

The previous prime is 20363840239. The next prime is 20363840243. The reversal of 20363840240 is 4204836302.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×20363840240³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20363840197 and 20363840206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20363840243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2956421 + ... + 2963300.

Almost surely, 2^20363840240 is an apocalyptic number.

20363840240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20363840240 is an abundant number, since it is smaller than the sum of its proper divisors (28083164608).

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

20363840240 is a wasteful number, since it uses less digits than its factorization.

20363840240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919777 (or 5919771 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 20363840240 in words is "twenty billion, three hundred sixty-three million, eight hundred forty thousand, two hundred forty".