20923727 has 4 divisors (see below), whose sum is σ = 22825896. Its totient is φ = 19021560.

The previous prime is 20923723. The next prime is 20923739. The reversal of 20923727 is 72732902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20923727 - 2² = 20923723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20923693 and 20923702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20923723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 951068 + ... + 951089.

It is an arithmetic number, because the mean of its divisors is an integer number (5706474).

Almost surely, 2^20923727 is an apocalyptic number.

20923727 is a deficient number, since it is larger than the sum of its proper divisors (1902169).

20923727 is a wasteful number, since it uses less digits than its factorization.

20923727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902168.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20923727 is about 4574.2460580953. The cubic root of 20923727 is about 275.5579942974.

The spelling of 20923727 in words is "twenty million, nine hundred twenty-three thousand, seven hundred twenty-seven".