20454031 has 4 divisors (see below), whose sum is σ = 22027432. Its totient is φ = 18880632.

The previous prime is 20454029. The next prime is 20454041. The reversal of 20454031 is 13045402.

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 20454031 - 2¹ = 20454029 is a prime.

It is a super-2 number, since 2×20454031² = 836734768297922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454001) 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, 786681 + ... + 786706.

It is an arithmetic number, because the mean of its divisors is an integer number (5506858).

Almost surely, 2^20454031 is an apocalyptic number.

20454031 is a deficient number, since it is larger than the sum of its proper divisors (1573401).

20454031 is a wasteful number, since it uses less digits than its factorization.

20454031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573400.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20454031 is about 4522.6132932189. The cubic root of 20454031 is about 273.4804609788.

Adding to 20454031 its reverse (13045402), we get a palindrome (33499433).

The spelling of 20454031 in words is "twenty million, four hundred fifty-four thousand, thirty-one".