23190986487 has 4 divisors (see below), whose sum is σ = 30921315320. Its totient is φ = 15460657656.

The previous prime is 23190986443. The next prime is 23190986501. The reversal of 23190986487 is 78468909132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23190986487 - 2²⁴ = 23174209271 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 (23190982487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3865164412 + ... + 3865164417.

It is an arithmetic number, because the mean of its divisors is an integer number (7730328830).

Almost surely, 2^23190986487 is an apocalyptic number.

23190986487 is a deficient number, since it is larger than the sum of its proper divisors (7730328833).

23190986487 is an equidigital number, since it uses as much as digits as its factorization.

23190986487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730328832.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 23190986487 in words is "twenty-three billion, one hundred ninety million, nine hundred eighty-six thousand, four hundred eighty-seven".