23999420016 has 200 divisors, whose sum is σ = 81605495664. Its totient is φ = 6713072640.

The previous prime is 23999419991. The next prime is 23999420023. The reversal of 23999420016 is 61002499932.

It is a happy number.

It is a super-2 number, since 2×23999420016² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 120580 + ... + 250076.

Almost surely, 2^23999420016 is an apocalyptic number.

23999420016 is a gapful number since it is divisible by the number (26) 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 23999420016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40802747832).

23999420016 is an abundant number, since it is smaller than the sum of its proper divisors (57606075648).

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

23999420016 is a wasteful number, since it uses less digits than its factorization.

23999420016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129541 (or 129526 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 23999420016 in words is "twenty-three billion, nine hundred ninety-nine million, four hundred twenty thousand, sixteen".