20420130221 has 8 divisors (see below), whose sum is σ = 20908322304. Its totient is φ = 19937332800.

The previous prime is 20420130197. The next prime is 20420130251. The reversal of 20420130221 is 12203102402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20420130221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20420130221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420130251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341005 + ... + 1356146.

It is an arithmetic number, because the mean of its divisors is an integer number (2613540288).

Almost surely, 2^20420130221 is an apocalyptic number.

It is an amenable number.

20420130221 is a deficient number, since it is larger than the sum of its proper divisors (488192083).

20420130221 is a wasteful number, since it uses less digits than its factorization.

20420130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697331.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20420130221 its reverse (12203102402), we get a palindrome (32623232623).

The spelling of 20420130221 in words is "twenty billion, four hundred twenty million, one hundred thirty thousand, two hundred twenty-one".