20453545 has 8 divisors (see below), whose sum is σ = 28050624. Its totient is φ = 14025264.

The previous prime is 20453539. The next prime is 20453549. The reversal of 20453545 is 54535402.

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 20453545 - 2¹³ = 20445353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20453549) 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, 292159 + ... + 292228.

It is an arithmetic number, because the mean of its divisors is an integer number (3506328).

Almost surely, 2^20453545 is an apocalyptic number.

It is an amenable number.

20453545 is a deficient number, since it is larger than the sum of its proper divisors (7597079).

20453545 is an equidigital number, since it uses as much as digits as its factorization.

20453545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584399.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 20453545 is about 4522.5595629024. The cubic root of 20453545 is about 273.4782949420.

Adding to 20453545 its reverse (54535402), we get a palindrome (74988947).

The spelling of 20453545 in words is "twenty million, four hundred fifty-three thousand, five hundred forty-five".