21520553200034 has 48 divisors (see below), whose sum is σ = 37648850025600. Its totient is φ = 9199125554976.

The previous prime is 21520553200009. The next prime is 21520553200043. The reversal of 21520553200034 is 43000235502512.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78826937 + ... + 79099475.

It is an arithmetic number, because the mean of its divisors is an integer number (784351042200).

Almost surely, 2^{21520553200034} is an apocalyptic number.

21520553200034 is a deficient number, since it is larger than the sum of its proper divisors (16128296825566).

21520553200034 is a wasteful number, since it uses less digits than its factorization.

21520553200034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274647 (or 274640 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 21520553200034 its reverse (43000235502512), we get a palindrome (64520788702546).

The spelling of 21520553200034 in words is "twenty-one trillion, five hundred twenty billion, five hundred fifty-three million, two hundred thousand, thirty-four".