213674643240 has 64 divisors (see below), whose sum is σ = 668894544000. Its totient is φ = 54502516992.

The previous prime is 213674643239. The next prime is 213674643253. The reversal of 213674643240 is 42346476312.

It is a junction number, because it is equal to n+sod(n) for n = 213674643192 and 213674643201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38706415 + ... + 38711934.

It is an arithmetic number, because the mean of its divisors is an integer number (10451477250).

Almost surely, 2^213674643240 is an apocalyptic number.

213674643240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213674643240 is an abundant number, since it is smaller than the sum of its proper divisors (455219900760).

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

213674643240 is a wasteful number, since it uses less digits than its factorization.

213674643240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77418386 (or 77418382 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 42.

The spelling of 213674643240 in words is "two hundred thirteen billion, six hundred seventy-four million, six hundred forty-three thousand, two hundred forty".