20424628 has 12 divisors (see below), whose sum is σ = 40849312. Its totient is φ = 8753400.

The previous prime is 20424619. The next prime is 20424631. The reversal of 20424628 is 82642402.

20424628 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 729451 = 20424628 / (2 + 0 + 4 + 2 + 4 + 6 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 20424596 and 20424605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364698 + ... + 364753.

Almost surely, 2^20424628 is an apocalyptic number.

20424628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20424628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20424628 is a wasteful number, since it uses less digits than its factorization.

20424628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729462 (or 729460 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 20424628 is about 4519.3614593214. The cubic root of 20424628 is about 273.3493539423.

It can be divided in two parts, 2042 and 4628, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 20424628 in words is "twenty million, four hundred twenty-four thousand, six hundred twenty-eight".