20152371 has 4 divisors (see below), whose sum is σ = 26869832. Its totient is φ = 13434912.

The previous prime is 20152367. The next prime is 20152381. The reversal of 20152371 is 17325102.

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

It is not a de Polignac number, because 20152371 - 2² = 20152367 is a prime.

It is a super-2 number, since 2×20152371² = 812236113843282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20152351) 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, 3358726 + ... + 3358731.

It is an arithmetic number, because the mean of its divisors is an integer number (6717458).

Almost surely, 2^20152371 is an apocalyptic number.

20152371 is a deficient number, since it is larger than the sum of its proper divisors (6717461).

20152371 is an equidigital number, since it uses as much as digits as its factorization.

20152371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6717460.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20152371 is about 4489.1392270679. The cubic root of 20152371 is about 272.1293493419.

Adding to 20152371 its reverse (17325102), we get a palindrome (37477473).

The spelling of 20152371 in words is "twenty million, one hundred fifty-two thousand, three hundred seventy-one".