20001210 has 16 divisors (see below), whose sum is σ = 48002976. Its totient is φ = 5333648.

The previous prime is 20001203. The next prime is 20001217. The reversal of 20001210 is 1210002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20001203) and next prime (20001217).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20001217) 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, 333324 + ... + 333383.

It is an arithmetic number, because the mean of its divisors is an integer number (3000186).

Almost surely, 2^20001210 is an apocalyptic number.

20001210 is an abundant number, since it is smaller than the sum of its proper divisors (28001766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001210 is a wasteful number, since it uses less digits than its factorization.

20001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666717.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 20001210 is about 4472.2712350661. The cubic root of 20001210 is about 271.4472356246.

Adding to 20001210 its reverse (1210002), we get a palindrome (21211212).

The spelling of 20001210 in words is "twenty million, one thousand, two hundred ten".