213434320240 has 20 divisors (see below), whose sum is σ = 496234794744. Its totient is φ = 85373728064.

The previous prime is 213434320237. The next prime is 213434320243. The reversal of 213434320240 is 42023434312.

It is an interprime number because it is at equal distance from previous prime (213434320237) and next prime (213434320243).

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 213434320199 and 213434320208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213434320243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1333964422 + ... + 1333964581.

Almost surely, 2^213434320240 is an apocalyptic number.

213434320240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213434320240 is an abundant number, since it is smaller than the sum of its proper divisors (282800474504).

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

213434320240 is a wasteful number, since it uses less digits than its factorization.

213434320240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667929016 (or 2667929010 counting only the distinct ones).

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

Adding to 213434320240 its reverse (42023434312), we get a palindrome (255457754552).

The spelling of 213434320240 in words is "two hundred thirteen billion, four hundred thirty-four million, three hundred twenty thousand, two hundred forty".