20215141 has 4 divisors (see below), whose sum is σ = 20224672. Its totient is φ = 20205612.

The previous prime is 20215133. The next prime is 20215147. The reversal of 20215141 is 14151202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20215141 - 2³ = 20215133 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 (20215147) 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, 16 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (5056168).

Almost surely, 2^20215141 is an apocalyptic number.

It is an amenable number.

20215141 is a deficient number, since it is larger than the sum of its proper divisors (9531).

20215141 is an equidigital number, since it uses as much as digits as its factorization.

20215141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9530.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 20215141 is about 4496.1251094693. The cubic root of 20215141 is about 272.4115966077.

Adding to 20215141 its reverse (14151202), we get a palindrome (34366343).

It can be divided in two parts, 2021 and 5141, that multiplied together give a triangular number (10389961 = T₄₅₅₈).

The spelling of 20215141 in words is "twenty million, two hundred fifteen thousand, one hundred forty-one".