20314544221 has 4 divisors (see below), whose sum is σ = 20345371200. Its totient is φ = 20283717244.

The previous prime is 20314544149. The next prime is 20314544273. The reversal of 20314544221 is 12244541302.

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 20314544221 - 2¹³ = 20314536029 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 20314544221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20314544021) 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, 15412501 + ... + 15413818.

It is an arithmetic number, because the mean of its divisors is an integer number (5086342800).

Almost surely, 2^20314544221 is an apocalyptic number.

It is an amenable number.

20314544221 is a deficient number, since it is larger than the sum of its proper divisors (30826979).

20314544221 is an equidigital number, since it uses as much as digits as its factorization.

20314544221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30826978.

The product of its (nonzero) digits is 7680, while the sum is 28.

The spelling of 20314544221 in words is "twenty billion, three hundred fourteen million, five hundred forty-four thousand, two hundred twenty-one".