20211131032440 has 128 divisors (see below), whose sum is σ = 63363546639360. Its totient is φ = 5152288264704.

The previous prime is 20211131032373. The next prime is 20211131032451. The reversal of 20211131032440 is 4423013111202.

It is a super-2 number, since 2×20211131032440² (a number of 27 digits) contains 22 as substring.

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 20211131032440.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 41426479 + ... + 41911518.

It is an arithmetic number, because the mean of its divisors is an integer number (495027708120).

Almost surely, 2^{20211131032440} is an apocalyptic number.

20211131032440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211131032440 is an abundant number, since it is smaller than the sum of its proper divisors (43152415606920).

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

20211131032440 is a wasteful number, since it uses less digits than its factorization.

20211131032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83338101 (or 83338097 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20211131032440 its reverse (4423013111202), we get a palindrome (24634144143642).

The spelling of 20211131032440 in words is "twenty trillion, two hundred eleven billion, one hundred thirty-one million, thirty-two thousand, four hundred forty".