20813941 has 4 divisors (see below), whose sum is σ = 20930400. Its totient is φ = 20697484.

The previous prime is 20813929. The next prime is 20813953. The reversal of 20813941 is 14931802.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (20813929) and next prime (20813953).

It is a cyclic number.

It is not a de Polignac number, because 20813941 - 2⁷ = 20813813 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 (20813921) 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, 57961 + ... + 58318.

It is an arithmetic number, because the mean of its divisors is an integer number (5232600).

Almost surely, 2^20813941 is an apocalyptic number.

It is an amenable number.

20813941 is a deficient number, since it is larger than the sum of its proper divisors (116459).

20813941 is a wasteful number, since it uses less digits than its factorization.

20813941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116458.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20813941 is about 4562.2298276172. The cubic root of 20813941 is about 275.0752014721.

The spelling of 20813941 in words is "twenty million, eight hundred thirteen thousand, nine hundred forty-one".