20503354553 has 8 divisors (see below), whose sum is σ = 22371235680. Its totient is φ = 18636130080.

The previous prime is 20503354477. The next prime is 20503354559. The reversal of 20503354553 is 35545330502.

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

It is a cyclic number.

It is not a de Polignac number, because 20503354553 - 2¹⁰ = 20503353529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20503354559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97700 + ... + 224837.

It is an arithmetic number, because the mean of its divisors is an integer number (2796404460).

Almost surely, 2^20503354553 is an apocalyptic number.

It is an amenable number.

20503354553 is a deficient number, since it is larger than the sum of its proper divisors (1867881127).

20503354553 is a wasteful number, since it uses less digits than its factorization.

20503354553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328327.

The product of its (nonzero) digits is 135000, while the sum is 35.

The spelling of 20503354553 in words is "twenty billion, five hundred three million, three hundred fifty-four thousand, five hundred fifty-three".