20321220030 has 32 divisors (see below), whose sum is σ = 48780434304. Its totient is φ = 5417935776.

The previous prime is 20321220013. The next prime is 20321220041. The reversal of 20321220030 is 3002212302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 20321219991 and 20321220009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97069 + ... + 223751.

It is an arithmetic number, because the mean of its divisors is an integer number (1524388572).

Almost surely, 2^20321220030 is an apocalyptic number.

20321220030 is an abundant number, since it is smaller than the sum of its proper divisors (28459214274).

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

20321220030 is a wasteful number, since it uses less digits than its factorization.

20321220030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132040.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20321220030 its reverse (3002212302), we get a palindrome (23323432332).

The spelling of 20321220030 in words is "twenty billion, three hundred twenty-one million, two hundred twenty thousand, thirty".