20281010 has 8 divisors (see below), whose sum is σ = 36505836. Its totient is φ = 8112400.

The previous prime is 20281007. The next prime is 20281013. The reversal of 20281010 is 1018202.

It is an interprime number because it is at equal distance from previous prime (20281007) and next prime (20281013).

It can be written as a sum of positive squares in 2 ways, for example, as 19193161 + 1087849 = 4381^2 + 1043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20281010² = 822638733240200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20281013) 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, 1014041 + ... + 1014060.

Almost surely, 2^20281010 is an apocalyptic number.

20281010 is a deficient number, since it is larger than the sum of its proper divisors (16224826).

20281010 is a wasteful number, since it uses less digits than its factorization.

20281010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028108.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 20281010 is about 4503.4442374698. Note that the first 3 decimals coincide. The cubic root of 20281010 is about 272.7071510744.

Adding to 20281010 its reverse (1018202), we get a palindrome (21299212).

The spelling of 20281010 in words is "twenty million, two hundred eighty-one thousand, ten".