23201687042 has 8 divisors (see below), whose sum is σ = 34808703996. Its totient is φ = 11598785712.

The previous prime is 23201687021. The next prime is 23201687053. The reversal of 23201687042 is 24078610232.

It is a Cunningham number, because it is equal to 152321²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 23201687041 + 1 = 152321^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 23201686993 and 23201687011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014773 + ... + 1037384.

Almost surely, 2^23201687042 is an apocalyptic number.

23201687042 is a deficient number, since it is larger than the sum of its proper divisors (11607016954).

23201687042 is a wasteful number, since it uses less digits than its factorization.

23201687042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057812.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 23201687042 in words is "twenty-three billion, two hundred one million, six hundred eighty-seven thousand, forty-two".