20534450553 has 12 divisors (see below), whose sum is σ = 29662321728. Its totient is φ = 13688965080.

The previous prime is 20534450533. The next prime is 20534450567. The reversal of 20534450553 is 35505443502.

20534450553 is a `hidden beast` number, since 2 + 0 + 53 + 4 + 4 + 50 + 553 = 666.

It is not a de Polignac number, because 20534450553 - 2²⁵ = 20500896121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20534450533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201076 + ... + 285482.

It is an arithmetic number, because the mean of its divisors is an integer number (2471860144).

Almost surely, 2^20534450553 is an apocalyptic number.

It is an amenable number.

20534450553 is a deficient number, since it is larger than the sum of its proper divisors (9127871175).

20534450553 is a wasteful number, since it uses less digits than its factorization.

20534450553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111444 (or 111441 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

The spelling of 20534450553 in words is "twenty billion, five hundred thirty-four million, four hundred fifty thousand, five hundred fifty-three".