12009301623 has 40 divisors (see below), whose sum is σ = 19806627456. Its totient is φ = 7190629200.

The previous prime is 12009301547. The next prime is 12009301651. The reversal of 12009301623 is 32610390021.

12009301623 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 9 + 30 + 1 + 623 = 666.

It is not a de Polignac number, because 12009301623 - 2¹⁶ = 12009236087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12009301663) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7243 + ... + 155148.

Almost surely, 2^12009301623 is an apocalyptic number.

12009301623 is a deficient number, since it is larger than the sum of its proper divisors (7797325833).

12009301623 is a wasteful number, since it uses less digits than its factorization.

12009301623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162497 (or 162488 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

Adding to 12009301623 its reverse (32610390021), we get a palindrome (44619691644).

The spelling of 12009301623 in words is "twelve billion, nine million, three hundred one thousand, six hundred twenty-three".