20420727 has 8 divisors (see below), whose sum is σ = 28166640. Its totient is φ = 13144320.

The previous prime is 20420681. The next prime is 20420759. The reversal of 20420727 is 72702402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20420727 - 2¹⁴ = 20404343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20420697 and 20420706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117274 + ... + 117447.

It is an arithmetic number, because the mean of its divisors is an integer number (3520830).

Almost surely, 2^20420727 is an apocalyptic number.

20420727 is a deficient number, since it is larger than the sum of its proper divisors (7745913).

20420727 is a wasteful number, since it uses less digits than its factorization.

20420727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234753.

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 20420727 is about 4518.9298511926. The cubic root of 20420727 is about 273.3319500558.

The spelling of 20420727 in words is "twenty million, four hundred twenty thousand, seven hundred twenty-seven".