210020109 has 8 divisors (see below), whose sum is σ = 301567392. Its totient is φ = 129243120.

The previous prime is 210020101. The next prime is 210020137. The reversal of 210020109 is 901020012.

It is a happy number.

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

It is not a de Polignac number, because 210020109 - 2³ = 210020101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020101) 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, 2692527 + ... + 2692604.

It is an arithmetic number, because the mean of its divisors is an integer number (37695924).

Almost surely, 2^210020109 is an apocalyptic number.

It is an amenable number.

210020109 is a deficient number, since it is larger than the sum of its proper divisors (91547283).

210020109 is a wasteful number, since it uses less digits than its factorization.

210020109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385147.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 210020109 is about 14492.0705559972. The cubic root of 210020109 is about 594.4111671035.

The spelling of 210020109 in words is "two hundred ten million, twenty thousand, one hundred nine".