20281024 has 14 divisors (see below), whose sum is σ = 40245284. Its totient is φ = 10140480.

The previous prime is 20281013. The next prime is 20281039. The reversal of 20281024 is 42018202.

It is a super-2 number, since 2×20281024² = 822639868977152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20280992 and 20281010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158382 + ... + 158509.

Almost surely, 2^20281024 is an apocalyptic number.

It is an amenable number.

20281024 is a deficient number, since it is larger than the sum of its proper divisors (19964260).

20281024 is an equidigital number, since it uses as much as digits as its factorization.

20281024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316903 (or 316893 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 20281024 is about 4503.4457918354. The cubic root of 20281024 is about 272.7072138244.

Adding to 20281024 its reverse (42018202), we get a palindrome (62299226).

The spelling of 20281024 in words is "twenty million, two hundred eighty-one thousand, twenty-four".