23171001840 has 120 divisors (see below), whose sum is σ = 88932531168. Its totient is φ = 5296227840.

The previous prime is 23171001823. The next prime is 23171001881. The reversal of 23171001840 is 4810017132.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2293671 + ... + 2303750.

Almost surely, 2^23171001840 is an apocalyptic number.

23171001840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23171001840 is an abundant number, since it is smaller than the sum of its proper divisors (65761529328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23171001840 is a wasteful number, since it uses less digits than its factorization.

23171001840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4597447 (or 4597438 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

Adding to 23171001840 its reverse (4810017132), we get a palindrome (27981018972).

The spelling of 23171001840 in words is "twenty-three billion, one hundred seventy-one million, one thousand, eight hundred forty".