213745020 has 24 divisors (see below), whose sum is σ = 598486224. Its totient is φ = 56998656.

The previous prime is 213745001. The next prime is 213745057. The reversal of 213745020 is 20547312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1781149 + ... + 1781268.

It is an arithmetic number, because the mean of its divisors is an integer number (24936926).

Almost surely, 2^213745020 is an apocalyptic number.

213745020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213745020 is an abundant number, since it is smaller than the sum of its proper divisors (384741204).

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

213745020 is a wasteful number, since it uses less digits than its factorization.

213745020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562429 (or 3562427 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 213745020 is about 14620.0212038150. The cubic root of 213745020 is about 597.9047472658.

The spelling of 213745020 in words is "two hundred thirteen million, seven hundred forty-five thousand, twenty".