20284424 has 8 divisors (see below), whose sum is σ = 38033310. Its totient is φ = 10142208.

The previous prime is 20284421. The next prime is 20284441. The reversal of 20284424 is 42448202.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 9721924 = 3250^2 + 3118^2 .

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

It is a super-2 number, since 2×20284424² = 822915714023552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20284393 and 20284402.

It is not an unprimeable number, because it can be changed into a prime (20284421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1267769 + ... + 1267784.

Almost surely, 2^20284424 is an apocalyptic number.

It is an amenable number.

20284424 is a deficient number, since it is larger than the sum of its proper divisors (17748886).

20284424 is a wasteful number, since it uses less digits than its factorization.

20284424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535559 (or 2535555 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 20284424 is about 4503.8232647385. The cubic root of 20284424 is about 272.7224522515.

The spelling of 20284424 in words is "twenty million, two hundred eighty-four thousand, four hundred twenty-four".