20168672 has 24 divisors (see below), whose sum is σ = 39855816. Its totient is φ = 10046592.

The previous prime is 20168657. The next prime is 20168683. The reversal of 20168672 is 27686102.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 8798 + ... + 10850.

It is an arithmetic number, because the mean of its divisors is an integer number (1660659).

Almost surely, 2^20168672 is an apocalyptic number.

It is an amenable number.

20168672 is a deficient number, since it is larger than the sum of its proper divisors (19687144).

20168672 is a wasteful number, since it uses less digits than its factorization.

20168672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370 (or 2362 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20168672 is about 4490.9544642537. The cubic root of 20168672 is about 272.2027035722.

The spelling of 20168672 in words is "twenty million, one hundred sixty-eight thousand, six hundred seventy-two".