21140404030 has 32 divisors (see below), whose sum is σ = 38365291008. Its totient is φ = 8386778400.

The previous prime is 21140404013. The next prime is 21140404037. The reversal of 21140404030 is 3040404112.

It is a junction number, because it is equal to n+sod(n) for n = 21140403989 and 21140404007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140404037) 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 15 ways as a sum of consecutive naturals, for example, 3023919 + ... + 3030901.

It is an arithmetic number, because the mean of its divisors is an integer number (1198915344).

Almost surely, 2^21140404030 is an apocalyptic number.

21140404030 is a deficient number, since it is larger than the sum of its proper divisors (17224886978).

21140404030 is a wasteful number, since it uses less digits than its factorization.

21140404030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9432.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21140404030 its reverse (3040404112), we get a palindrome (24180808142).

The spelling of 21140404030 in words is "twenty-one billion, one hundred forty million, four hundred four thousand, thirty".