20533531353 has 4 divisors (see below), whose sum is σ = 27378041808. Its totient is φ = 13689020900.

The previous prime is 20533531351. The next prime is 20533531373. The reversal of 20533531353 is 35313533502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20533531353 - 2¹ = 20533531351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20533531351) by changing a digit.

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, 3422255223 + ... + 3422255228.

It is an arithmetic number, because the mean of its divisors is an integer number (6844510452).

Almost surely, 2^20533531353 is an apocalyptic number.

It is an amenable number.

20533531353 is a deficient number, since it is larger than the sum of its proper divisors (6844510455).

20533531353 is an equidigital number, since it uses as much as digits as its factorization.

20533531353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6844510454.

The product of its (nonzero) digits is 60750, while the sum is 33.

The spelling of 20533531353 in words is "twenty billion, five hundred thirty-three million, five hundred thirty-one thousand, three hundred fifty-three".