210220020 has 36 divisors (see below), whose sum is σ = 637667940. Its totient is φ = 56058624.

The previous prime is 210220019. The next prime is 210220033. The reversal of 210220020 is 20022012.

It can be written as a sum of positive squares in 2 ways, for example, as 58339044 + 151880976 = 7638^2 + 12324^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 210219984 and 210220011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583765 + ... + 584124.

Almost surely, 2^210220020 is an apocalyptic number.

210220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210220020 is an abundant number, since it is smaller than the sum of its proper divisors (427447920).

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

210220020 is a wasteful number, since it uses less digits than its factorization.

210220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167904 (or 1167899 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 210220020 is about 14498.9661700412. The cubic root of 210220020 is about 594.5997072202.

Adding to 210220020 its reverse (20022012), we get a palindrome (230242032).

It can be divided in two parts, 2102 and 20020, that added together give a palindrome (22122).

The spelling of 210220020 in words is "two hundred ten million, two hundred twenty thousand, twenty".