213179709820 has 48 divisors (see below), whose sum is σ = 558143244288. Its totient is φ = 66445623360.

The previous prime is 213179709817. The next prime is 213179709877. The reversal of 213179709820 is 28907971312.

213179709820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 69212652 + ... + 69215731.

It is an arithmetic number, because the mean of its divisors is an integer number (11627984256).

Almost surely, 2^213179709820 is an apocalyptic number.

213179709820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213179709820 is an abundant number, since it is smaller than the sum of its proper divisors (344963534468).

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

213179709820 is a wasteful number, since it uses less digits than its factorization.

213179709820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138428410 (or 138428408 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 213179709820 in words is "two hundred thirteen billion, one hundred seventy-nine million, seven hundred nine thousand, eight hundred twenty".