23215020 has 48 divisors (see below), whose sum is σ = 66594528. Its totient is φ = 6039040.

The previous prime is 23215009. The next prime is 23215079. The reversal of 23215020 is 2051232.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2259 + ... + 7178.

It is an arithmetic number, because the mean of its divisors is an integer number (1387386).

Almost surely, 2^23215020 is an apocalyptic number.

23215020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23215020 is an abundant number, since it is smaller than the sum of its proper divisors (43379508).

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

23215020 is a wasteful number, since it uses less digits than its factorization.

23215020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9490 (or 9488 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 23215020 is about 4818.1967581244. The cubic root of 23215020 is about 285.2701654842.

Adding to 23215020 its reverse (2051232), we get a palindrome (25266252).

The spelling of 23215020 in words is "twenty-three million, two hundred fifteen thousand, twenty".