16017001220 has 48 divisors (see below), whose sum is σ = 37474230528. Its totient is φ = 5700437760.

The previous prime is 16017001219. The next prime is 16017001249. The reversal of 16017001220 is 2210071061.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 16017001192 and 16017001201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764177 + ... + 784856.

It is an arithmetic number, because the mean of its divisors is an integer number (780713136).

Almost surely, 2^16017001220 is an apocalyptic number.

16017001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16017001220 is an abundant number, since it is smaller than the sum of its proper divisors (21457229308).

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

16017001220 is a wasteful number, since it uses less digits than its factorization.

16017001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549100 (or 1549098 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 16017001220 its reverse (2210071061), we get a palindrome (18227072281).

The spelling of 16017001220 in words is "sixteen billion, seventeen million, one thousand, two hundred twenty".