21041455052 has 12 divisors (see below), whose sum is σ = 37678884936. Its totient is φ = 10276059360.

The previous prime is 21041454997. The next prime is 21041455087. The reversal of 21041455052 is 25055414012.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 61166849 + ... + 61167192.

It is an arithmetic number, because the mean of its divisors is an integer number (3139907078).

Almost surely, 2^21041455052 is an apocalyptic number.

It is an amenable number.

21041455052 is a deficient number, since it is larger than the sum of its proper divisors (16637429884).

21041455052 is a wasteful number, since it uses less digits than its factorization.

21041455052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122334088 (or 122334086 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 21041455052 its reverse (25055414012), we get a palindrome (46096869064).

The spelling of 21041455052 in words is "twenty-one billion, forty-one million, four hundred fifty-five thousand, fifty-two".