20011010 has 8 divisors (see below), whose sum is σ = 36019836. Its totient is φ = 8004400.

The previous prime is 20011007. The next prime is 20011031. The reversal of 20011010 is 1011002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17986081 + 2024929 = 4241^2 + 1423^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 20010985 and 20011003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000541 + ... + 1000560.

Almost surely, 2^20011010 is an apocalyptic number.

20011010 is a deficient number, since it is larger than the sum of its proper divisors (16008826).

20011010 is a wasteful number, since it uses less digits than its factorization.

20011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001108.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 20011010 is about 4473.3667410576. The cubic root of 20011010 is about 271.4915620855.

Adding to 20011010 its reverse (1011002), we get a palindrome (21022012).

The spelling of 20011010 in words is "twenty million, eleven thousand, ten".