20430454 has 16 divisors (see below), whose sum is σ = 33587136. Its totient is φ = 9243400.

The previous prime is 20430439. The next prime is 20430467. The reversal of 20430454 is 45403402.

It is a happy number.

It is a super-2 number, since 2×20430454² = 834806901292232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2949 + ... + 7039.

It is an arithmetic number, because the mean of its divisors is an integer number (2099196).

Almost surely, 2^20430454 is an apocalyptic number.

20430454 is a deficient number, since it is larger than the sum of its proper divisors (13156682).

20430454 is a wasteful number, since it uses less digits than its factorization.

20430454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4331.

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

The square root of 20430454 is about 4520.0059734474. The cubic root of 20430454 is about 273.3753418810.

Adding to 20430454 its reverse (45403402), we get a palindrome (65833856).

The spelling of 20430454 in words is "twenty million, four hundred thirty thousand, four hundred fifty-four".