20031003132440 has 64 divisors (see below), whose sum is σ = 47445545599200. Its totient is φ = 7590104552448.

The previous prime is 20031003132431. The next prime is 20031003132457. The reversal of 20031003132440 is 4423130013002.

It is a congruent number.

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, 8796692 + ... + 10837148.

Almost surely, 2^{20031003132440} is an apocalyptic number.

20031003132440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031003132440 is an abundant number, since it is smaller than the sum of its proper divisors (27414542466760).

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

20031003132440 is a wasteful number, since it uses less digits than its factorization.

20031003132440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053404 (or 2053400 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20031003132440 its reverse (4423130013002), we get a palindrome (24454133145442).

The spelling of 20031003132440 in words is "twenty trillion, thirty-one billion, three million, one hundred thirty-two thousand, four hundred forty".