16557036 has 12 divisors (see below), whose sum is σ = 38633112. Its totient is φ = 5519008.

The previous prime is 16557001. The next prime is 16557049. The reversal of 16557036 is 63075561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×16557036² = 548270882210592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16556988 and 16557006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689865 + ... + 689888.

It is an arithmetic number, because the mean of its divisors is an integer number (3219426).

Almost surely, 2^16557036 is an apocalyptic number.

It is an amenable number.

16557036 is an abundant number, since it is smaller than the sum of its proper divisors (22076076).

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

16557036 is a wasteful number, since it uses less digits than its factorization.

16557036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379760 (or 1379758 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 16557036 is about 4069.0337919462. The cubic root of 16557036 is about 254.8751715063.

The spelling of 16557036 in words is "sixteen million, five hundred fifty-seven thousand, thirty-six".