21013422030 has 64 divisors (see below), whose sum is σ = 56126764800. Its totient is φ = 5594482080.

The previous prime is 21013422029. The next prime is 21013422037. The reversal of 21013422030 is 3022431012.

21013422030 is a `hidden beast` number, since 210 + 1 + 3 + 422 + 0 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21013421994 and 21013422012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013422037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104265 + ... + 229995.

It is an arithmetic number, because the mean of its divisors is an integer number (876980700).

Almost surely, 2^21013422030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21013422030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28063382400).

21013422030 is an abundant number, since it is smaller than the sum of its proper divisors (35113342770).

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

21013422030 is a wasteful number, since it uses less digits than its factorization.

21013422030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126366 (or 126360 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21013422030 its reverse (3022431012), we get a palindrome (24035853042).

The spelling of 21013422030 in words is "twenty-one billion, thirteen million, four hundred twenty-two thousand, thirty".