20500010 has 16 divisors (see below), whose sum is σ = 36972936. Its totient is φ = 8183808.

The previous prime is 20499971. The next prime is 20500019. The reversal of 20500010 is 1000502.

It can be written as a sum of positive squares in 4 ways, for example, as 11215801 + 9284209 = 3349^2 + 3047^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20500019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4202 + ... + 7658.

Almost surely, 2^20500010 is an apocalyptic number.

20500010 is a deficient number, since it is larger than the sum of its proper divisors (16472926).

20500010 is a wasteful number, since it uses less digits than its factorization.

20500010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4057.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 20500010 is about 4527.6936733838. The cubic root of 20500010 is about 273.6852282416.

Adding to 20500010 its reverse (1000502), we get a palindrome (21500512).

The spelling of 20500010 in words is "twenty million, five hundred thousand, ten".