21545033425353 has 32 divisors (see below), whose sum is σ = 33310869780480. Its totient is φ = 13736990005200.

The previous prime is 21545033425319. The next prime is 21545033425367. The reversal of 21545033425353 is 35352433054512.

21545033425353 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 503 + 3 + 42 + 53 + 53 = 666.

It is not a de Polignac number, because 21545033425353 - 2⁹ = 21545033424841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21545033425299 and 21545033425308.

It is not an unprimeable number, because it can be changed into a prime (21545033425303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2205150 + ... + 6924792.

It is an arithmetic number, because the mean of its divisors is an integer number (1040964680640).

Almost surely, 2^{21545033425353} is an apocalyptic number.

21545033425353 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21545033425353 is a deficient number, since it is larger than the sum of its proper divisors (11765836355127).

21545033425353 is a wasteful number, since it uses less digits than its factorization.

21545033425353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727026 (or 4727020 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 45.

Adding to 21545033425353 its reverse (35352433054512), we get a palindrome (56897466479865).

The spelling of 21545033425353 in words is "twenty-one trillion, five hundred forty-five billion, thirty-three million, four hundred twenty-five thousand, three hundred fifty-three".