24871994421 has 8 divisors (see below), whose sum is σ = 33247911840. Its totient is φ = 16538703312.

The previous prime is 24871994417. The next prime is 24871994447. The reversal of 24871994421 is 12449917842.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 24871994421 - 2² = 24871994417 is a prime.

It is a super-2 number, since 2×24871994421² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24871994491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10655215 + ... + 10657548.

It is an arithmetic number, because the mean of its divisors is an integer number (4155988980).

Almost surely, 2^24871994421 is an apocalyptic number.

It is an amenable number.

24871994421 is a deficient number, since it is larger than the sum of its proper divisors (8375917419).

24871994421 is a wasteful number, since it uses less digits than its factorization.

24871994421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21313155.

The product of its digits is 1161216, while the sum is 51.

The spelling of 24871994421 in words is "twenty-four billion, eight hundred seventy-one million, nine hundred ninety-four thousand, four hundred twenty-one".