20530421211 has 8 divisors (see below), whose sum is σ = 28317822480. Its totient is φ = 13214983712.

The previous prime is 20530421203. The next prime is 20530421227. The reversal of 20530421211 is 11212403502.

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

It is a cyclic number.

It is not a de Polignac number, because 20530421211 - 2³ = 20530421203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20530421201) 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, 117990840 + ... + 117991013.

It is an arithmetic number, because the mean of its divisors is an integer number (3539727810).

Almost surely, 2^20530421211 is an apocalyptic number.

20530421211 is a deficient number, since it is larger than the sum of its proper divisors (7787401269).

20530421211 is a wasteful number, since it uses less digits than its factorization.

20530421211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235981885.

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

Adding to 20530421211 its reverse (11212403502), we get a palindrome (31742824713).

The spelling of 20530421211 in words is "twenty billion, five hundred thirty million, four hundred twenty-one thousand, two hundred eleven".