20454424 has 8 divisors (see below), whose sum is σ = 38352060. Its totient is φ = 10227208.

The previous prime is 20454409. The next prime is 20454463. The reversal of 20454424 is 42445402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20454424² = 836766922343552, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278394 + ... + 1278409.

Almost surely, 2^20454424 is an apocalyptic number.

It is an amenable number.

20454424 is a deficient number, since it is larger than the sum of its proper divisors (17897636).

20454424 is a wasteful number, since it uses less digits than its factorization.

20454424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556809 (or 2556805 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 20454424 is about 4522.6567413413. The cubic root of 20454424 is about 273.4822125021.

Adding to 20454424 its reverse (42445402), we get a palindrome (62899826).

The spelling of 20454424 in words is "twenty million, four hundred fifty-four thousand, four hundred twenty-four".