213402343420 has 48 divisors (see below), whose sum is σ = 513442980288. Its totient is φ = 72984038400.

The previous prime is 213402343417. The next prime is 213402343421. The reversal of 213402343420 is 24343204312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213402343421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1844487 + ... + 1956766.

It is an arithmetic number, because the mean of its divisors is an integer number (10696728756).

Almost surely, 2^213402343420 is an apocalyptic number.

213402343420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213402343420 is an abundant number, since it is smaller than the sum of its proper divisors (300040636868).

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

213402343420 is a wasteful number, since it uses less digits than its factorization.

213402343420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801670 (or 3801668 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 213402343420 its reverse (24343204312), we get a palindrome (237745547732).

The spelling of 213402343420 in words is "two hundred thirteen billion, four hundred two million, three hundred forty-three thousand, four hundred twenty".