23191436 has 6 divisors (see below), whose sum is σ = 40585020. Its totient is φ = 11595716.

The previous prime is 23191433. The next prime is 23191453. The reversal of 23191436 is 63419132.

It is a junction number, because it is equal to n+sod(n) for n = 23191399 and 23191408.

It is not an unprimeable number, because it can be changed into a prime (23191433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2898926 + ... + 2898933.

It is an arithmetic number, because the mean of its divisors is an integer number (6764170).

Almost surely, 2^23191436 is an apocalyptic number.

It is an amenable number.

23191436 is a deficient number, since it is larger than the sum of its proper divisors (17393584).

23191436 is a wasteful number, since it uses less digits than its factorization.

23191436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797863 (or 5797861 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 23191436 is about 4815.7487475989. The cubic root of 23191436 is about 285.1735313350.

It can be divided in two parts, 23 and 191436, that multiplied together give a triangular number (4403028 = T₂₉₆₇).

The spelling of 23191436 in words is "twenty-three million, one hundred ninety-one thousand, four hundred thirty-six".