20011211444 has 12 divisors (see below), whose sum is σ = 40022422944. Its totient is φ = 8576233464.

The previous prime is 20011211351. The next prime is 20011211491. The reversal of 20011211444 is 44411211002.

20011211444 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357343034 + ... + 357343089.

It is an arithmetic number, because the mean of its divisors is an integer number (3335201912).

Almost surely, 2^20011211444 is an apocalyptic number.

It is an amenable number.

20011211444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20011211444 is a wasteful number, since it uses less digits than its factorization.

20011211444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714686134 (or 714686132 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20011211444 its reverse (44411211002), we get a palindrome (64422422446).

The spelling of 20011211444 in words is "twenty billion, eleven million, two hundred eleven thousand, four hundred forty-four".