20533421353 has 8 divisors (see below), whose sum is σ = 21759192000. Its totient is φ = 19322157168.

The previous prime is 20533421339. The next prime is 20533421357. The reversal of 20533421353 is 35312433502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20533421353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20533421357) 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 7 ways as a sum of consecutive naturals, for example, 3623701 + ... + 3629362.

It is an arithmetic number, because the mean of its divisors is an integer number (2719899000).

Almost surely, 2^20533421353 is an apocalyptic number.

It is an amenable number.

20533421353 is a deficient number, since it is larger than the sum of its proper divisors (1225770647).

20533421353 is a wasteful number, since it uses less digits than its factorization.

20533421353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253231.

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 20533421353 its reverse (35312433502), we get a palindrome (55845854855).

The spelling of 20533421353 in words is "twenty billion, five hundred thirty-three million, four hundred twenty-one thousand, three hundred fifty-three".