213432012340 has 24 divisors (see below), whose sum is σ = 448354355400. Its totient is φ = 85344780288.

The previous prime is 213432012329. The next prime is 213432012347. The reversal of 213432012340 is 43210234312.

It can be written as a sum of positive squares in 4 ways, for example, as 37726846756 + 175705165584 = 194234^2 + 419172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213432012347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689037 + ... + 1810996.

It is an arithmetic number, because the mean of its divisors is an integer number (18681431475).

Almost surely, 2^213432012340 is an apocalyptic number.

213432012340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213432012340 is an abundant number, since it is smaller than the sum of its proper divisors (234922343060).

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

213432012340 is a wasteful number, since it uses less digits than its factorization.

213432012340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503091 (or 3503089 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 213432012340 its reverse (43210234312), we get a palindrome (256642246652).

The spelling of 213432012340 in words is "two hundred thirteen billion, four hundred thirty-two million, twelve thousand, three hundred forty".