213641020 has 24 divisors (see below), whose sum is σ = 468153504. Its totient is φ = 81740736.

The previous prime is 213641011. The next prime is 213641083. The reversal of 213641020 is 20146312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231759 + ... + 232678.

It is an arithmetic number, because the mean of its divisors is an integer number (19506396).

Almost surely, 2^213641020 is an apocalyptic number.

213641020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213641020 is an abundant number, since it is smaller than the sum of its proper divisors (254512484).

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

213641020 is a wasteful number, since it uses less digits than its factorization.

213641020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464469 (or 464467 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 213641020 is about 14616.4640046764. The cubic root of 213641020 is about 597.8077591480.

Adding to 213641020 its reverse (20146312), we get a palindrome (233787332).

The spelling of 213641020 in words is "two hundred thirteen million, six hundred forty-one thousand, twenty".