21140431040043 has 24 divisors (see below), whose sum is σ = 36191025980928. Its totient is φ = 12080246307624.

The previous prime is 21140431040041. The next prime is 21140431040063. The reversal of 21140431040043 is 34004013404112.

21140431040043 is a `hidden beast` number, since 211 + 4 + 0 + 4 + 3 + 1 + 0 + 400 + 43 = 666.

It is not a de Polignac number, because 21140431040043 - 2¹ = 21140431040041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21140431039989 and 21140431040016.

It is not an unprimeable number, because it can be changed into a prime (21140431040041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6214116771 + ... + 6214120172.

It is an arithmetic number, because the mean of its divisors is an integer number (1507959415872).

Almost surely, 2^{21140431040043} is an apocalyptic number.

21140431040043 is a deficient number, since it is larger than the sum of its proper divisors (15050594940885).

21140431040043 is an equidigital number, since it uses as much as digits as its factorization.

21140431040043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12428236965 (or 12428236953 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21140431040043 its reverse (34004013404112), we get a palindrome (55144444444155).

The spelling of 21140431040043 in words is "twenty-one trillion, one hundred forty billion, four hundred thirty-one million, forty thousand, forty-three".