20123302212 has 36 divisors (see below), whose sum is σ = 54780101740. Its totient is φ = 6191785152.

The previous prime is 20123302207. The next prime is 20123302253. The reversal of 20123302212 is 21220332102.

It can be written as a sum of positive squares in 2 ways, for example, as 5968489536 + 14154812676 = 77256^2 + 118974^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21498787 + ... + 21499722.

Almost surely, 2^20123302212 is an apocalyptic number.

It is an amenable number.

20123302212 is an abundant number, since it is smaller than the sum of its proper divisors (34656799528).

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

20123302212 is a wasteful number, since it uses less digits than its factorization.

20123302212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42998532 (or 42998527 counting only the distinct ones).

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

Adding to 20123302212 its reverse (21220332102), we get a palindrome (41343634314).

The spelling of 20123302212 in words is "twenty billion, one hundred twenty-three million, three hundred two thousand, two hundred twelve".