20454043 has 4 divisors (see below), whose sum is σ = 21657240. Its totient is φ = 19250848.

The previous prime is 20454041. The next prime is 20454059. The reversal of 20454043 is 34045402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20454043 - 2¹ = 20454041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20454041) 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, 601573 + ... + 601606.

It is an arithmetic number, because the mean of its divisors is an integer number (5414310).

Almost surely, 2^20454043 is an apocalyptic number.

20454043 is a deficient number, since it is larger than the sum of its proper divisors (1203197).

20454043 is a wasteful number, since it uses less digits than its factorization.

20454043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203196.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20454043 is about 4522.6146198853. The cubic root of 20454043 is about 273.4805144608.

Adding to 20454043 its reverse (34045402), we get a palindrome (54499445).

The spelling of 20454043 in words is "twenty million, four hundred fifty-four thousand, forty-three".