15840229920 has 192 divisors, whose sum is σ = 51559732224. Its totient is φ = 4085222400.

The previous prime is 15840229903. The next prime is 15840229957. The reversal of 15840229920 is 2992204851.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2122195 + ... + 2129645.

It is an arithmetic number, because the mean of its divisors is an integer number (268540272).

Almost surely, 2^15840229920 is an apocalyptic number.

15840229920 is a gapful number since it is divisible by the number (10) 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 15840229920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25779866112).

15840229920 is an abundant number, since it is smaller than the sum of its proper divisors (35719502304).

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

15840229920 is a wasteful number, since it uses less digits than its factorization.

15840229920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615 (or 7607 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 15840229920 in words is "fifteen billion, eight hundred forty million, two hundred twenty-nine thousand, nine hundred twenty".