23051650721 has 4 divisors (see below), whose sum is σ = 25147255344. Its totient is φ = 20956046100.

The previous prime is 23051650631. The next prime is 23051650733. The reversal of 23051650721 is 12705615032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-23051650721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23051650751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047802295 + ... + 1047802316.

It is an arithmetic number, because the mean of its divisors is an integer number (6286813836).

Almost surely, 2^23051650721 is an apocalyptic number.

It is an amenable number.

23051650721 is a deficient number, since it is larger than the sum of its proper divisors (2095604623).

23051650721 is a wasteful number, since it uses less digits than its factorization.

23051650721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095604622.

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 23051650721 in words is "twenty-three billion, fifty-one million, six hundred fifty thousand, seven hundred twenty-one".