20990341 has 4 divisors (see below), whose sum is σ = 21436992. Its totient is φ = 20543692.

The previous prime is 20990311. The next prime is 20990353. The reversal of 20990341 is 14309902.

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 a cyclic number.

It is not a de Polignac number, because 20990341 - 2¹³ = 20982149 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 (20990311) 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, 223255 + ... + 223348.

It is an arithmetic number, because the mean of its divisors is an integer number (5359248).

Almost surely, 2^20990341 is an apocalyptic number.

It is an amenable number.

20990341 is a deficient number, since it is larger than the sum of its proper divisors (446651).

20990341 is an equidigital number, since it uses as much as digits as its factorization.

20990341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446650.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 20990341 is about 4581.5216904430. The cubic root of 20990341 is about 275.8501120265.

The spelling of 20990341 in words is "twenty million, nine hundred ninety thousand, three hundred forty-one".