20454535 has 4 divisors (see below), whose sum is σ = 24545448. Its totient is φ = 16363624.

The previous prime is 20454529. The next prime is 20454547. The reversal of 20454535 is 53545402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53545402 = 2 ⋅26772701.

It is a cyclic number.

It is not a de Polignac number, because 20454535 - 2⁹ = 20454023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045449 + ... + 2045458.

It is an arithmetic number, because the mean of its divisors is an integer number (6136362).

Almost surely, 2^20454535 is an apocalyptic number.

20454535 is a deficient number, since it is larger than the sum of its proper divisors (4090913).

20454535 is an equidigital number, since it uses as much as digits as its factorization.

20454535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090912.

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

The square root of 20454535 is about 4522.6690128728. The cubic root of 20454535 is about 273.4827072031.

Adding to 20454535 its reverse (53545402), we get a palindrome (73999937).

The spelling of 20454535 in words is "twenty million, four hundred fifty-four thousand, five hundred thirty-five".