20145941 has 4 divisors (see below), whose sum is σ = 20157900. Its totient is φ = 20133984.

The previous prime is 20145911. The next prime is 20145943. The reversal of 20145941 is 14954102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13845841 + 6300100 = 3721^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 20145941 - 2¹⁸ = 19883797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20145941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145943) 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, 2936 + ... + 6993.

It is an arithmetic number, because the mean of its divisors is an integer number (5039475).

Almost surely, 2^20145941 is an apocalyptic number.

It is an amenable number.

20145941 is a deficient number, since it is larger than the sum of its proper divisors (11959).

20145941 is an equidigital number, since it uses as much as digits as its factorization.

20145941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11958.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20145941 is about 4488.4229970002. The cubic root of 20145941 is about 272.1004035692.

The spelling of 20145941 in words is "twenty million, one hundred forty-five thousand, nine hundred forty-one".