16631433 has 48 divisors (see below), whose sum is σ = 30898560. Its totient is φ = 8763552.

The previous prime is 16631429. The next prime is 16631437. The reversal of 16631433 is 33413661.

It is an interprime number because it is at equal distance from previous prime (16631429) and next prime (16631437).

It is not a de Polignac number, because 16631433 - 2² = 16631429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 16631397 and 16631406.

It is not an unprimeable number, because it can be changed into a prime (16631437) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16716 + ... + 17682.

It is an arithmetic number, because the mean of its divisors is an integer number (643720).

Almost surely, 2^16631433 is an apocalyptic number.

16631433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16631433 is a deficient number, since it is larger than the sum of its proper divisors (14267127).

16631433 is a wasteful number, since it uses less digits than its factorization.

16631433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 990 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 16631433 is about 4078.1653963516. The cubic root of 16631433 is about 255.2563512006.

The spelling of 16631433 in words is "sixteen million, six hundred thirty-one thousand, four hundred thirty-three".