223240020 has 24 divisors (see below), whose sum is σ = 625072224. Its totient is φ = 59530656.

The previous prime is 223240019. The next prime is 223240033. The reversal of 223240020 is 20042322.

It is a super-3 number, since 3×223240020³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1860274 + ... + 1860393.

It is an arithmetic number, because the mean of its divisors is an integer number (26044676).

Almost surely, 2^223240020 is an apocalyptic number.

223240020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223240020 is an abundant number, since it is smaller than the sum of its proper divisors (401832204).

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

223240020 is a wasteful number, since it uses less digits than its factorization.

223240020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720679 (or 3720677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 223240020 is about 14941.2188257853. The cubic root of 223240020 is about 606.6301867262.

Adding to 223240020 its reverse (20042322), we get a palindrome (243282342).

The spelling of 223240020 in words is "two hundred twenty-three million, two hundred forty thousand, twenty".