20011021244 has 24 divisors (see below), whose sum is σ = 36207175200. Its totient is φ = 9669744576.

The previous prime is 20011021231. The next prime is 20011021271. The reversal of 20011021244 is 44212011002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431672 + ... + 475775.

It is an arithmetic number, because the mean of its divisors is an integer number (1508632300).

Almost surely, 2^20011021244 is an apocalyptic number.

It is an amenable number.

20011021244 is a deficient number, since it is larger than the sum of its proper divisors (16196153956).

20011021244 is a wasteful number, since it uses less digits than its factorization.

20011021244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907637 (or 907635 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20011021244 its reverse (44212011002), we get a palindrome (64223032246).

The spelling of 20011021244 in words is "twenty billion, eleven million, twenty-one thousand, two hundred forty-four".