23000587991 has 16 divisors (see below), whose sum is σ = 23655663360. Its totient is φ = 22350209280.

The previous prime is 23000587891. The next prime is 23000587993. The reversal of 23000587991 is 19978500032.

It is a cyclic number.

It is not a de Polignac number, because 23000587991 - 2²² = 22996393687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23000587993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16751381 + ... + 16752753.

It is an arithmetic number, because the mean of its divisors is an integer number (1478478960).

Almost surely, 2^23000587991 is an apocalyptic number.

23000587991 is a deficient number, since it is larger than the sum of its proper divisors (655075369).

23000587991 is a wasteful number, since it uses less digits than its factorization.

23000587991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 23000587991 in words is "twenty-three billion, five hundred eighty-seven thousand, nine hundred ninety-one".