210020136 has 32 divisors (see below), whose sum is σ = 527018400. Its totient is φ = 69744320.

The previous prime is 210020101. The next prime is 210020137. The reversal of 210020136 is 631020012.

It is not an unprimeable number, because it can be changed into a prime (210020137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9810 + ... + 22721.

It is an arithmetic number, because the mean of its divisors is an integer number (16469325).

Almost surely, 2^210020136 is an apocalyptic number.

It is an amenable number.

210020136 is an abundant number, since it is smaller than the sum of its proper divisors (316998264).

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

210020136 is a wasteful number, since it uses less digits than its factorization.

210020136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32809 (or 32805 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 210020136 is about 14492.0714875410. The cubic root of 210020136 is about 594.4111925759.

Adding to 210020136 its reverse (631020012), we get a palindrome (841040148).

The spelling of 210020136 in words is "two hundred ten million, twenty thousand, one hundred thirty-six".