24871994420 has 192 divisors, whose sum is σ = 66724922880. Its totient is φ = 7574611968.

The previous prime is 24871994417. The next prime is 24871994447. The reversal of 24871994420 is 2449917842.

It is a super-2 number, since 2×24871994420² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20953067 + ... + 20954253.

It is an arithmetic number, because the mean of its divisors is an integer number (347525640).

Almost surely, 2^24871994420 is an apocalyptic number.

24871994420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 24871994420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33362461440).

24871994420 is an abundant number, since it is smaller than the sum of its proper divisors (41852928460).

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

24871994420 is a wasteful number, since it uses less digits than its factorization.

24871994420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 24871994420 in words is "twenty-four billion, eight hundred seventy-one million, nine hundred ninety-four thousand, four hundred twenty".