20012213304 has 72 divisors (see below), whose sum is σ = 55134644760. Its totient is φ = 6557592288.

The previous prime is 20012213293. The next prime is 20012213327. The reversal of 20012213304 is 40331221002.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 210709 + ... + 290555.

It is an arithmetic number, because the mean of its divisors is an integer number (765758955).

Almost surely, 2^20012213304 is an apocalyptic number.

20012213304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012213304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27567322380).

20012213304 is an abundant number, since it is smaller than the sum of its proper divisors (35122431456).

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

20012213304 is a wasteful number, since it uses less digits than its factorization.

20012213304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79977 (or 79911 counting only the distinct ones).

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

Adding to 20012213304 its reverse (40331221002), we get a palindrome (60343434306).

The spelling of 20012213304 in words is "twenty billion, twelve million, two hundred thirteen thousand, three hundred four".