21140330030 has 32 divisors (see below), whose sum is σ = 39290469120. Its totient is φ = 8181192960.

The previous prime is 21140329997. The next prime is 21140330053. The reversal of 21140330030 is 3003304112.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21140329990 and 21140330008.

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 15 ways as a sum of consecutive naturals, for example, 1672976 + ... + 1685564.

It is an arithmetic number, because the mean of its divisors is an integer number (1227827160).

Almost surely, 2^21140330030 is an apocalyptic number.

21140330030 is a deficient number, since it is larger than the sum of its proper divisors (18150139090).

21140330030 is a wasteful number, since it uses less digits than its factorization.

21140330030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18044.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21140330030 its reverse (3003304112), we get a palindrome (24143634142).

The spelling of 21140330030 in words is "twenty-one billion, one hundred forty million, three hundred thirty thousand, thirty".