212740637320 has 16 divisors (see below), whose sum is σ = 478666434060. Its totient is φ = 85096254912.

The previous prime is 212740637233. The next prime is 212740637323. The reversal of 212740637320 is 23736047212.

It can be written as a sum of positive squares in 2 ways, for example, as 212279504644 + 461132676 = 460738^2 + 21474^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212740637320.

It is not an unprimeable number, because it can be changed into a prime (212740637323) 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, 2659257927 + ... + 2659258006.

Almost surely, 2^212740637320 is an apocalyptic number.

212740637320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212740637320 is an abundant number, since it is smaller than the sum of its proper divisors (265925796740).

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

212740637320 is a wasteful number, since it uses less digits than its factorization.

212740637320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318515944 (or 5318515940 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The spelling of 212740637320 in words is "two hundred twelve billion, seven hundred forty million, six hundred thirty-seven thousand, three hundred twenty".