212947169620 has 24 divisors (see below), whose sum is σ = 448387970184. Its totient is φ = 84950503296.

The previous prime is 212947169597. The next prime is 212947169641. The reversal of 212947169620 is 26961749212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 58300034116 + 154647135504 = 241454^2 + 393252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14265139 + ... + 14280058.

It is an arithmetic number, because the mean of its divisors is an integer number (18682832091).

Almost surely, 2^212947169620 is an apocalyptic number.

212947169620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212947169620 is an abundant number, since it is smaller than the sum of its proper divisors (235440800564).

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

212947169620 is a wasteful number, since it uses less digits than its factorization.

212947169620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28545579 (or 28545577 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 212947169620 in words is "two hundred twelve billion, nine hundred forty-seven million, one hundred sixty-nine thousand, six hundred twenty".