20475427 has 8 divisors (see below), whose sum is σ = 23632992. Its totient is φ = 17376000.

The previous prime is 20475383. The next prime is 20475491. The reversal of 20475427 is 72457402.

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 20475427 - 2¹⁵ = 20442659 is a prime.

It is a super-3 number, since 3×20475427³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20475527) 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, 13774 + ... + 15187.

It is an arithmetic number, because the mean of its divisors is an integer number (2954124).

Almost surely, 2^20475427 is an apocalyptic number.

20475427 is a deficient number, since it is larger than the sum of its proper divisors (3157565).

20475427 is a wasteful number, since it uses less digits than its factorization.

20475427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29069.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 20475427 is about 4524.9781214941. The cubic root of 20475427 is about 273.5757860982.

It can be divided in two parts, 20475 and 427, that added together give a palindrome (20902).

The spelling of 20475427 in words is "twenty million, four hundred seventy-five thousand, four hundred twenty-seven".