20297727 has 6 divisors (see below), whose sum is σ = 29318952. Its totient is φ = 13531812.

The previous prime is 20297713. The next prime is 20297731. The reversal of 20297727 is 72779202.

It is not a de Polignac number, because 20297727 - 2⁶ = 20297663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20297691 and 20297700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20297027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1127643 + ... + 1127660.

It is an arithmetic number, because the mean of its divisors is an integer number (4886492).

Almost surely, 2^20297727 is an apocalyptic number.

20297727 is a deficient number, since it is larger than the sum of its proper divisors (9021225).

20297727 is a wasteful number, since it uses less digits than its factorization.

20297727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255309 (or 2255306 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 20297727 is about 4505.2998790314. The cubic root of 20297727 is about 272.7820584787.

The spelling of 20297727 in words is "twenty million, two hundred ninety-seven thousand, seven hundred twenty-seven".