16617442820 has 48 divisors (see below), whose sum is σ = 38266397568. Its totient is φ = 6011381760.

The previous prime is 16617442817. The next prime is 16617442823. The reversal of 16617442820 is 2824471661.

16617442820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16617442817) and next prime (16617442823).

It is a super-2 number, since 2×16617442820² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16617442823) 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 15 ways as a sum of consecutive naturals, for example, 153224 + ... + 238143.

It is an arithmetic number, because the mean of its divisors is an integer number (797216616).

Almost surely, 2^16617442820 is an apocalyptic number.

16617442820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16617442820 is an abundant number, since it is smaller than the sum of its proper divisors (21648954748).

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

16617442820 is a wasteful number, since it uses less digits than its factorization.

16617442820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391580 (or 391578 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 16617442820 in words is "sixteen billion, six hundred seventeen million, four hundred forty-two thousand, eight hundred twenty".