20427573553 has 4 divisors (see below), whose sum is σ = 20428048368. Its totient is φ = 20427098740.

The previous prime is 20427573527. The next prime is 20427573559. The reversal of 20427573553 is 35537572402.

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 20427573553 - 2⁹ = 20427573041 is a prime.

It is a super-2 number, since 2×20427573553² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20427573559) 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, 165643 + ... + 261328.

It is an arithmetic number, because the mean of its divisors is an integer number (5107012092).

Almost surely, 2^20427573553 is an apocalyptic number.

It is an amenable number.

20427573553 is a deficient number, since it is larger than the sum of its proper divisors (474815).

20427573553 is an equidigital number, since it uses as much as digits as its factorization.

20427573553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474814.

The product of its (nonzero) digits is 882000, while the sum is 43.

The spelling of 20427573553 in words is "twenty billion, four hundred twenty-seven million, five hundred seventy-three thousand, five hundred fifty-three".