20532442153 has 4 divisors (see below), whose sum is σ = 21087373060. Its totient is φ = 19977511248.

The previous prime is 20532442123. The next prime is 20532442159. The reversal of 20532442153 is 35124423502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12516463129 + 8015979024 = 111877^2 + 89532^2 .

It is a cyclic number.

It is not a de Polignac number, because 20532442153 - 2¹⁷ = 20532311081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20532442159) 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, 277465398 + ... + 277465471.

It is an arithmetic number, because the mean of its divisors is an integer number (5271843265).

Almost surely, 2^20532442153 is an apocalyptic number.

It is an amenable number.

20532442153 is a deficient number, since it is larger than the sum of its proper divisors (554930907).

20532442153 is an equidigital number, since it uses as much as digits as its factorization.

20532442153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554930906.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20532442153 its reverse (35124423502), we get a palindrome (55656865655).

The spelling of 20532442153 in words is "twenty billion, five hundred thirty-two million, four hundred forty-two thousand, one hundred fifty-three".