213435204220 has 24 divisors (see below), whose sum is σ = 512244490464. Its totient is φ = 73177784256.

The previous prime is 213435204217. The next prime is 213435204251. The reversal of 213435204220 is 22402534312.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 762268447 + ... + 762268726.

It is an arithmetic number, because the mean of its divisors is an integer number (21343520436).

Almost surely, 2^213435204220 is an apocalyptic number.

213435204220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213435204220 is an abundant number, since it is smaller than the sum of its proper divisors (298809286244).

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

213435204220 is a wasteful number, since it uses less digits than its factorization.

213435204220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524537189 (or 1524537187 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 213435204220 its reverse (22402534312), we get a palindrome (235837738532).

The spelling of 213435204220 in words is "two hundred thirteen billion, four hundred thirty-five million, two hundred four thousand, two hundred twenty".