21115345245430 has 8 divisors (see below), whose sum is σ = 38007621441792. Its totient is φ = 8446138098168.

The previous prime is 21115345245403. The next prime is 21115345245433. The reversal of 21115345245430 is 3454254351112.

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 (21115345245433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055767262262 + ... + 1055767262281.

It is an arithmetic number, because the mean of its divisors is an integer number (4750952680224).

Almost surely, 2^{21115345245430} is an apocalyptic number.

21115345245430 is a deficient number, since it is larger than the sum of its proper divisors (16892276196362).

21115345245430 is a wasteful number, since it uses less digits than its factorization.

21115345245430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111534524550.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 21115345245430 its reverse (3454254351112), we get a palindrome (24569599596542).

The spelling of 21115345245430 in words is "twenty-one trillion, one hundred fifteen billion, three hundred forty-five million, two hundred forty-five thousand, four hundred thirty".