213013332020 has 24 divisors (see below), whose sum is σ = 447337485000. Its totient is φ = 85203525632.

The previous prime is 213013331941. The next prime is 213013332041. The reversal of 213013332020 is 20233310312.

It can be written as a sum of positive squares in 4 ways, for example, as 1740725284 + 211272606736 = 41722^2 + 459644^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 213013331983 and 213013332001.

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, 1261556 + ... + 1420404.

It is an arithmetic number, because the mean of its divisors is an integer number (18639061875).

Almost surely, 2^213013332020 is an apocalyptic number.

213013332020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213013332020 is an abundant number, since it is smaller than the sum of its proper divisors (234324152980).

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

213013332020 is a wasteful number, since it uses less digits than its factorization.

213013332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225907 (or 225905 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 213013332020 its reverse (20233310312), we get a palindrome (233246642332).

The spelling of 213013332020 in words is "two hundred thirteen billion, thirteen million, three hundred thirty-two thousand, twenty".