23620155 has 32 divisors (see below), whose sum is σ = 41186880. Its totient is φ = 11489280.

The previous prime is 23620153. The next prime is 23620183. The reversal of 23620155 is 55102632.

It is not a de Polignac number, because 23620155 - 2¹ = 23620153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23620153) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 16675 + ... + 18035.

It is an arithmetic number, because the mean of its divisors is an integer number (1287090).

Almost surely, 2^23620155 is an apocalyptic number.

23620155 is a deficient number, since it is larger than the sum of its proper divisors (17566725).

23620155 is a wasteful number, since it uses less digits than its factorization.

23620155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 23620155 is about 4860.0570984300. The cubic root of 23620155 is about 286.9200609392.

Adding to 23620155 its reverse (55102632), we get a palindrome (78722787).

The spelling of 23620155 in words is "twenty-three million, six hundred twenty thousand, one hundred fifty-five".