20541553223 has 4 divisors (see below), whose sum is σ = 20543454360. Its totient is φ = 20539652088.

The previous prime is 20541553217. The next prime is 20541553247. The reversal of 20541553223 is 32235514502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20541553223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20541553223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541558223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 934268 + ... + 956001.

It is an arithmetic number, because the mean of its divisors is an integer number (5135863590).

Almost surely, 2^20541553223 is an apocalyptic number.

20541553223 is a deficient number, since it is larger than the sum of its proper divisors (1901137).

20541553223 is a wasteful number, since it uses less digits than its factorization.

20541553223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901136.

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

The spelling of 20541553223 in words is "twenty billion, five hundred forty-one million, five hundred fifty-three thousand, two hundred twenty-three".