20302224021 has 24 divisors (see below), whose sum is σ = 30418227840. Its totient is φ = 13531849632.

The previous prime is 20302224017. The next prime is 20302224037. The reversal of 20302224021 is 12042220302.

It is not a de Polignac number, because 20302224021 - 2² = 20302224017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20302223985 and 20302224003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302224521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2090545 + ... + 2100233.

It is an arithmetic number, because the mean of its divisors is an integer number (1267426160).

Almost surely, 2^20302224021 is an apocalyptic number.

It is an amenable number.

20302224021 is a deficient number, since it is larger than the sum of its proper divisors (10116003819).

20302224021 is an frugal number, since it uses more digits than its factorization.

20302224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18327 (or 18315 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20302224021 its reverse (12042220302), we get a palindrome (32344444323).

The spelling of 20302224021 in words is "twenty billion, three hundred two million, two hundred twenty-four thousand, twenty-one".