23138643590 has 32 divisors (see below), whose sum is σ = 42050858400. Its totient is φ = 9166641664.

The previous prime is 23138643587. The next prime is 23138643599. The reversal of 23138643590 is 9534683132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23138643599) 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, 494654 + ... + 539406.

It is an arithmetic number, because the mean of its divisors is an integer number (1314089325).

Almost surely, 2^23138643590 is an apocalyptic number.

23138643590 is a deficient number, since it is larger than the sum of its proper divisors (18912214810).

23138643590 is a wasteful number, since it uses less digits than its factorization.

23138643590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45256.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 23138643590 in words is "twenty-three billion, one hundred thirty-eight million, six hundred forty-three thousand, five hundred ninety".