20532445553 has 8 divisors (see below), whose sum is σ = 20556835200. Its totient is φ = 20508073488.

The previous prime is 20532445523. The next prime is 20532445559. The reversal of 20532445553 is 35554423502.

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 20532445553 - 2⁶ = 20532445489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20532445559) 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, 5489558 + ... + 5493296.

It is an arithmetic number, because the mean of its divisors is an integer number (2569604400).

Almost surely, 2^20532445553 is an apocalyptic number.

It is an amenable number.

20532445553 is a deficient number, since it is larger than the sum of its proper divisors (24389647).

20532445553 is a wasteful number, since it uses less digits than its factorization.

20532445553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8791.

The product of its (nonzero) digits is 360000, while the sum is 38.

The spelling of 20532445553 in words is "twenty billion, five hundred thirty-two million, four hundred forty-five thousand, five hundred fifty-three".