20729272 has 16 divisors (see below), whose sum is σ = 39816000. Its totient is φ = 10111680.

The previous prime is 20729263. The next prime is 20729281. The reversal of 20729272 is 27292702.

It is an interprime number because it is at equal distance from previous prime (20729263) and next prime (20729281).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31272 + ... + 31927.

It is an arithmetic number, because the mean of its divisors is an integer number (2488500).

Almost surely, 2^20729272 is an apocalyptic number.

It is an amenable number.

20729272 is a deficient number, since it is larger than the sum of its proper divisors (19086728).

20729272 is a wasteful number, since it uses less digits than its factorization.

20729272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63246 (or 63242 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20729272 is about 4552.9410275118. The cubic root of 20729272 is about 274.7017018913.

The spelling of 20729272 in words is "twenty million, seven hundred twenty-nine thousand, two hundred seventy-two".