213673780 has 12 divisors (see below), whose sum is σ = 448714980. Its totient is φ = 85469504.

The previous prime is 213673777. The next prime is 213673783. The reversal of 213673780 is 87376312.

It is an interprime number because it is at equal distance from previous prime (213673777) and next prime (213673783).

It can be written as a sum of positive squares in 2 ways, for example, as 148742416 + 64931364 = 12196^2 + 8058^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213673783) 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, 5341825 + ... + 5341864.

It is an arithmetic number, because the mean of its divisors is an integer number (37392915).

Almost surely, 2^213673780 is an apocalyptic number.

213673780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213673780 is an abundant number, since it is smaller than the sum of its proper divisors (235041200).

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

213673780 is a wasteful number, since it uses less digits than its factorization.

213673780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10683698 (or 10683696 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 213673780 is about 14617.5846157975. The cubic root of 213673780 is about 597.8383138003.

The spelling of 213673780 in words is "two hundred thirteen million, six hundred seventy-three thousand, seven hundred eighty".