20254151 has 4 divisors (see below), whose sum is σ = 20952600. Its totient is φ = 19555704.

The previous prime is 20254141. The next prime is 20254153. The reversal of 20254151 is 15145202.

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

It is a cyclic number.

It is not a de Polignac number, because 20254151 - 2¹⁰ = 20253127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20254153) 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, 349181 + ... + 349238.

It is an arithmetic number, because the mean of its divisors is an integer number (5238150).

Almost surely, 2^20254151 is an apocalyptic number.

20254151 is a deficient number, since it is larger than the sum of its proper divisors (698449).

20254151 is an equidigital number, since it uses as much as digits as its factorization.

20254151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698448.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 20254151 is about 4500.4611985884. The cubic root of 20254151 is about 272.5867120168.

Adding to 20254151 its reverse (15145202), we get a palindrome (35399353).

The spelling of 20254151 in words is "twenty million, two hundred fifty-four thousand, one hundred fifty-one".