213187900820 has 48 divisors (see below), whose sum is σ = 457416723456. Its totient is φ = 83437968000.

The previous prime is 213187900813. The next prime is 213187900823. The reversal of 213187900820 is 28009781312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213187900823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224426 + ... + 690465.

It is an arithmetic number, because the mean of its divisors is an integer number (9529515072).

Almost surely, 2^213187900820 is an apocalyptic number.

213187900820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213187900820 is an abundant number, since it is smaller than the sum of its proper divisors (244228822636).

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

213187900820 is a wasteful number, since it uses less digits than its factorization.

213187900820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915152 (or 915150 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 213187900820 in words is "two hundred thirteen billion, one hundred eighty-seven million, nine hundred thousand, eight hundred twenty".