20788427 has 8 divisors (see below), whose sum is σ = 22712880. Its totient is φ = 18869760.

The previous prime is 20788403. The next prime is 20788457. The reversal of 20788427 is 72488702.

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

It is a cyclic number.

It is not a de Polignac number, because 20788427 - 2¹² = 20784331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20788457) 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, 10163 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (2839110).

Almost surely, 2^20788427 is an apocalyptic number.

20788427 is a deficient number, since it is larger than the sum of its proper divisors (1924453).

20788427 is a wasteful number, since it uses less digits than its factorization.

20788427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 20788427 is about 4559.4327498056. The cubic root of 20788427 is about 274.9627585932.

The spelling of 20788427 in words is "twenty million, seven hundred eighty-eight thousand, four hundred twenty-seven".