20013210 has 64 divisors (see below), whose sum is σ = 60998400. Its totient is φ = 4574016.

The previous prime is 20013193. The next prime is 20013221. The reversal of 20013210 is 1231002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20013192 and 20013201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3405 + ... + 7184.

It is an arithmetic number, because the mean of its divisors is an integer number (953100).

Almost surely, 2^20013210 is an apocalyptic number.

20013210 is an abundant number, since it is smaller than the sum of its proper divisors (40985190).

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

20013210 is a wasteful number, since it uses less digits than its factorization.

20013210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10612 (or 10606 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20013210 is about 4473.6126341023. The cubic root of 20013210 is about 271.5015109345.

Adding to 20013210 its reverse (1231002), we get a palindrome (21244212).

The spelling of 20013210 in words is "twenty million, thirteen thousand, two hundred ten".