20020221043 has 4 divisors (see below), whose sum is σ = 20022673408. Its totient is φ = 20017768680.

The previous prime is 20020221029. The next prime is 20020221059. The reversal of 20020221043 is 34012202002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20020221043 - 2⁹ = 20020220531 is a prime.

It is a super-2 number, since 2×20020221043² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020221083) 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, 1213896 + ... + 1230277.

It is an arithmetic number, because the mean of its divisors is an integer number (5005668352).

Almost surely, 2^20020221043 is an apocalyptic number.

20020221043 is a deficient number, since it is larger than the sum of its proper divisors (2452365).

20020221043 is an equidigital number, since it uses as much as digits as its factorization.

20020221043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452364.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20020221043 its reverse (34012202002), we get a palindrome (54032423045).

The spelling of 20020221043 in words is "twenty billion, twenty million, two hundred twenty-one thousand, forty-three".