20873224 has 16 divisors (see below), whose sum is σ = 39779820. Its totient is φ = 10265280.

The previous prime is 20873221. The next prime is 20873227. The reversal of 20873224 is 42237802.

It is an interprime number because it is at equal distance from previous prime (20873221) and next prime (20873227).

It can be written as a sum of positive squares in 2 ways, for example, as 15350724 + 5522500 = 3918^2 + 2350^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20873192 and 20873201.

It is not an unprimeable number, because it can be changed into a prime (20873221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20899 + ... + 21874.

Almost surely, 2^20873224 is an apocalyptic number.

It is an amenable number.

20873224 is a deficient number, since it is larger than the sum of its proper divisors (18906596).

20873224 is a wasteful number, since it uses less digits than its factorization.

20873224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42840 (or 42836 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20873224 is about 4568.7223596975. The cubic root of 20873224 is about 275.3361135421.

The spelling of 20873224 in words is "twenty million, eight hundred seventy-three thousand, two hundred twenty-four".