20401027 has 4 divisors (see below), whose sum is σ = 20466520. Its totient is φ = 20335536.

The previous prime is 20401021. The next prime is 20401033. The reversal of 20401027 is 72010402.

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

It is an interprime number because it is at equal distance from previous prime (20401021) and next prime (20401033).

It is a cyclic number.

It is not a de Polignac number, because 20401027 - 2¹¹ = 20398979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20401027.

It is not an unprimeable number, because it can be changed into a prime (20401021) 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 3 ways as a sum of consecutive naturals, for example, 32277 + ... + 32902.

It is an arithmetic number, because the mean of its divisors is an integer number (5116630).

Almost surely, 2^20401027 is an apocalyptic number.

20401027 is a deficient number, since it is larger than the sum of its proper divisors (65493).

20401027 is an equidigital number, since it uses as much as digits as its factorization.

20401027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65492.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20401027 is about 4516.7496056346. The cubic root of 20401027 is about 273.2440267761.

Adding to 20401027 its reverse (72010402), we get a palindrome (92411429).

The spelling of 20401027 in words is "twenty million, four hundred one thousand, twenty-seven".