21113343516546 has 64 divisors (see below), whose sum is σ = 49390424265600. Its totient is φ = 6667035998400.

The previous prime is 21113343516539. The next prime is 21113343516649. The reversal of 21113343516546 is 64561534331112.

21113343516546 is a `hidden beast` number, since 2 + 1 + 1 + 13 + 3 + 43 + 51 + 6 + 546 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20279956 + ... + 21295616.

It is an arithmetic number, because the mean of its divisors is an integer number (771725379150).

Almost surely, 2^{21113343516546} is an apocalyptic number.

21113343516546 is an abundant number, since it is smaller than the sum of its proper divisors (28277080749054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113343516546 is a wasteful number, since it uses less digits than its factorization.

21113343516546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035952 (or 1035946 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

Adding to 21113343516546 its reverse (64561534331112), we get a palindrome (85674877847658).

The spelling of 21113343516546 in words is "twenty-one trillion, one hundred thirteen billion, three hundred forty-three million, five hundred sixteen thousand, five hundred forty-six".