20729367 has 6 divisors (see below), whose sum is σ = 29942432. Its totient is φ = 13819572.

The previous prime is 20729351. The next prime is 20729369. The reversal of 20729367 is 76392702.

It is not a de Polignac number, because 20729367 - 2⁴ = 20729351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20729369) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1151623 + ... + 1151640.

Almost surely, 2^20729367 is an apocalyptic number.

20729367 is a deficient number, since it is larger than the sum of its proper divisors (9213065).

20729367 is a wasteful number, since it uses less digits than its factorization.

20729367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303269 (or 2303266 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 20729367 is about 4552.9514603167. The cubic root of 20729367 is about 274.7021215333.

The spelling of 20729367 in words is "twenty million, seven hundred twenty-nine thousand, three hundred sixty-seven".