20402330132240 has 80 divisors (see below), whose sum is σ = 54217292037888. Its totient is φ = 6994389616128.

The previous prime is 20402330132209. The next prime is 20402330132257. The reversal of 20402330132240 is 4223103320402.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3847229 + ... + 7456931.

Almost surely, 2^{20402330132240} is an apocalyptic number.

20402330132240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402330132240 is an abundant number, since it is smaller than the sum of its proper divisors (33814961905648).

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

20402330132240 is a wasteful number, since it uses less digits than its factorization.

20402330132240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3619816 (or 3619810 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 20402330132240 its reverse (4223103320402), we get a palindrome (24625433452642).

The spelling of 20402330132240 in words is "twenty trillion, four hundred two billion, three hundred thirty million, one hundred thirty-two thousand, two hundred forty".