21455443540030 has 8 divisors (see below), whose sum is σ = 38619798372072. Its totient is φ = 8582177416008.

The previous prime is 21455443540001. The next prime is 21455443540033. The reversal of 21455443540030 is 3004534455412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455443540033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072772176992 + ... + 1072772177011.

It is an arithmetic number, because the mean of its divisors is an integer number (4827474796509).

Almost surely, 2^{21455443540030} is an apocalyptic number.

21455443540030 is a deficient number, since it is larger than the sum of its proper divisors (17164354832042).

21455443540030 is a wasteful number, since it uses less digits than its factorization.

21455443540030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145544354010.

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 21455443540030 its reverse (3004534455412), we get a palindrome (24459977995442).

The spelling of 21455443540030 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred forty-three million, five hundred forty thousand, thirty".