20121443626 has 8 divisors (see below), whose sum is σ = 30182925924. Its totient is φ = 10060468320.

The previous prime is 20121443623. The next prime is 20121443651. The reversal of 20121443626 is 62634412102.

It can be written as a sum of positive squares in 2 ways, for example, as 20078606601 + 42837025 = 141699^2 + 6545^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20121443621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3595 + ... + 200638.

Almost surely, 2^20121443626 is an apocalyptic number.

20121443626 is a deficient number, since it is larger than the sum of its proper divisors (10061482298).

20121443626 is a wasteful number, since it uses less digits than its factorization.

20121443626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253496.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 20121443626 its reverse (62634412102), we get a palindrome (82755855728).

The spelling of 20121443626 in words is "twenty billion, one hundred twenty-one million, four hundred forty-three thousand, six hundred twenty-six".