16820919486 has 64 divisors (see below), whose sum is σ = 44097884160. Its totient is φ = 4650942240.

The previous prime is 16820919463. The next prime is 16820919559. The reversal of 16820919486 is 68491902861.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent 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, 706021 + ... + 729456.

It is an arithmetic number, because the mean of its divisors is an integer number (689029440).

Almost surely, 2^16820919486 is an apocalyptic number.

16820919486 is an abundant number, since it is smaller than the sum of its proper divisors (27276964674).

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

16820919486 is a wasteful number, since it uses less digits than its factorization.

16820919486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435526 (or 1435520 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 16820919486 in words is "sixteen billion, eight hundred twenty million, nine hundred nineteen thousand, four hundred eighty-six".