20424016 has 10 divisors (see below), whose sum is σ = 39571562. Its totient is φ = 10212000.

The previous prime is 20423989. The next prime is 20424043. The reversal of 20424016 is 61042402.

It is an interprime number because it is at equal distance from previous prime (20423989) and next prime (20424043).

It can be written as a sum of positive squares in only one way, i.e., 14470416 + 5953600 = 3804^2 + 2440^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20423984 and 20424002.

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, 638235 + ... + 638266.

Almost surely, 2^20424016 is an apocalyptic number.

It is an amenable number.

20424016 is a deficient number, since it is larger than the sum of its proper divisors (19147546).

20424016 is a wasteful number, since it uses less digits than its factorization.

20424016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276509 (or 1276503 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20424016 is about 4519.2937501340. The cubic root of 20424016 is about 273.3466237176.

Adding to 20424016 its reverse (61042402), we get a palindrome (81466418).

The spelling of 20424016 in words is "twenty million, four hundred twenty-four thousand, sixteen".