20514621 has 4 divisors (see below), whose sum is σ = 27352832. Its totient is φ = 13676412.

The previous prime is 20514619. The next prime is 20514677. The reversal of 20514621 is 12641502.

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 20514621 - 2¹ = 20514619 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 (20514601) 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, 3419101 + ... + 3419106.

It is an arithmetic number, because the mean of its divisors is an integer number (6838208).

Almost surely, 2^20514621 is an apocalyptic number.

It is an amenable number.

20514621 is a deficient number, since it is larger than the sum of its proper divisors (6838211).

20514621 is an equidigital number, since it uses as much as digits as its factorization.

20514621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838210.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20514621 is about 4529.3069006196. The cubic root of 20514621 is about 273.7502341484.

The spelling of 20514621 in words is "twenty million, five hundred fourteen thousand, six hundred twenty-one".