20016211530 has 64 divisors (see below), whose sum is σ = 56385457920. Its totient is φ = 4451480064.

The previous prime is 20016211469. The next prime is 20016211531. The reversal of 20016211530 is 3511261002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20016211497 and 20016211506.

It is not an unprimeable number, because it can be changed into a prime (20016211531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1280275 + ... + 1295814.

It is an arithmetic number, because the mean of its divisors is an integer number (881022780).

Almost surely, 2^20016211530 is an apocalyptic number.

20016211530 is an abundant number, since it is smaller than the sum of its proper divisors (36369246390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20016211530 is a wasteful number, since it uses less digits than its factorization.

20016211530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576143.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 20016211530 its reverse (3511261002), we get a palindrome (23527472532).

The spelling of 20016211530 in words is "twenty billion, sixteen million, two hundred eleven thousand, five hundred thirty".