23193220 has 12 divisors (see below), whose sum is σ = 48705804. Its totient is φ = 9277280.

The previous prime is 23193199. The next prime is 23193227. The reversal of 23193220 is 2239132.

It can be written as a sum of positive squares in 2 ways, for example, as 16128256 + 7064964 = 4016^2 + 2658^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23193191 and 23193200.

It is not an unprimeable number, because it can be changed into a prime (23193227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579811 + ... + 579850.

It is an arithmetic number, because the mean of its divisors is an integer number (4058817).

Almost surely, 2^23193220 is an apocalyptic number.

23193220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23193220 is an abundant number, since it is smaller than the sum of its proper divisors (25512584).

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

23193220 is a wasteful number, since it uses less digits than its factorization.

23193220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159670 (or 1159668 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 23193220 is about 4815.9339696470. The cubic root of 23193220 is about 285.1808434672.

It can be divided in two parts, 2319 and 3220, that multiplied together give a triangular number (7467180 = T₃₈₆₄).

The spelling of 23193220 in words is "twenty-three million, one hundred ninety-three thousand, two hundred twenty".