23661603 has 24 divisors (see below), whose sum is σ = 41359968. Its totient is φ = 12724992.

The previous prime is 23661601. The next prime is 23661619. The reversal of 23661603 is 30616632.

It is not a de Polignac number, because 23661603 - 2¹ = 23661601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23661601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9976 + ... + 12117.

It is an arithmetic number, because the mean of its divisors is an integer number (1723332).

Almost surely, 2^23661603 is an apocalyptic number.

23661603 is a deficient number, since it is larger than the sum of its proper divisors (17698365).

23661603 is a wasteful number, since it uses less digits than its factorization.

23661603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22123 (or 22120 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 23661603 is about 4864.3193768502. The cubic root of 23661603 is about 287.0877893529.

It can be divided in two parts, 2366 and 1603, that added together give a square (3969 = 63²).

The spelling of 23661603 in words is "twenty-three million, six hundred sixty-one thousand, six hundred three".