16919972 has 6 divisors (see below), whose sum is σ = 29609958. Its totient is φ = 8459984.

The previous prime is 16919971. The next prime is 16919977. The reversal of 16919972 is 27991961.

It can be written as a sum of positive squares in only one way, i.e., 10086976 + 6832996 = 3176^2 + 2614^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16919971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2114993 + ... + 2115000.

It is an arithmetic number, because the mean of its divisors is an integer number (4934993).

Almost surely, 2^16919972 is an apocalyptic number.

It is an amenable number.

16919972 is a deficient number, since it is larger than the sum of its proper divisors (12689986).

16919972 is a wasteful number, since it uses less digits than its factorization.

16919972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229997 (or 4229995 counting only the distinct ones).

The product of its digits is 61236, while the sum is 44.

The square root of 16919972 is about 4113.3893567228. The cubic root of 16919972 is about 256.7240448172.

The spelling of 16919972 in words is "sixteen million, nine hundred nineteen thousand, nine hundred seventy-two".