20613441 has 4 divisors (see below), whose sum is σ = 27484592. Its totient is φ = 13742292.

The previous prime is 20613433. The next prime is 20613457. The reversal of 20613441 is 14431602.

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 not a de Polignac number, because 20613441 - 2³ = 20613433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20613491) 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, 3435571 + ... + 3435576.

It is an arithmetic number, because the mean of its divisors is an integer number (6871148).

Almost surely, 2^20613441 is an apocalyptic number.

It is an amenable number.

20613441 is a deficient number, since it is larger than the sum of its proper divisors (6871151).

20613441 is an equidigital number, since it uses as much as digits as its factorization.

20613441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871150.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20613441 is about 4540.2027487768. The cubic root of 20613441 is about 274.1890866307.

The spelling of 20613441 in words is "twenty million, six hundred thirteen thousand, four hundred forty-one".