20460427 has 4 divisors (see below), whose sum is σ = 22034320. Its totient is φ = 18886536.

The previous prime is 20460373. The next prime is 20460443. The reversal of 20460427 is 72406402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72406402 = 2 ⋅36203201.

It is a cyclic number.

It is not a de Polignac number, because 20460427 - 2¹⁹ = 19936139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20460467) 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, 786927 + ... + 786952.

It is an arithmetic number, because the mean of its divisors is an integer number (5508580).

Almost surely, 2^20460427 is an apocalyptic number.

20460427 is a deficient number, since it is larger than the sum of its proper divisors (1573893).

20460427 is a wasteful number, since it uses less digits than its factorization.

20460427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573892.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20460427 is about 4523.3203512464. The cubic root of 20460427 is about 273.5089638973.

Adding to 20460427 its reverse (72406402), we get a palindrome (92866829).

The spelling of 20460427 in words is "twenty million, four hundred sixty thousand, four hundred twenty-seven".