20254147 has 4 divisors (see below), whose sum is σ = 20272896. Its totient is φ = 20235400.

The previous prime is 20254141. The next prime is 20254153. The reversal of 20254147 is 74145202.

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 (20254141) and next prime (20254153).

It is a cyclic number.

It is not a de Polignac number, because 20254147 - 2¹⁵ = 20221379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20254141) 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, 7648 + ... + 9949.

It is an arithmetic number, because the mean of its divisors is an integer number (5068224).

Almost surely, 2^20254147 is an apocalyptic number.

20254147 is a deficient number, since it is larger than the sum of its proper divisors (18749).

20254147 is a wasteful number, since it uses less digits than its factorization.

20254147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18748.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20254147 is about 4500.4607541895. The cubic root of 20254147 is about 272.5866940724.

Adding to 20254147 its reverse (74145202), we get a palindrome (94399349).

The spelling of 20254147 in words is "twenty million, two hundred fifty-four thousand, one hundred forty-seven".