20838347244 has 144 divisors (see below), whose sum is σ = 65524062240. Its totient is φ = 5486008320.

The previous prime is 20838347209. The next prime is 20838347249. The reversal of 20838347244 is 44274383802.

20838347244 is a `hidden beast` number, since 20 + 8 + 383 + 4 + 7 + 244 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20838347244.

It is not an unprimeable number, because it can be changed into a prime (20838347249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31539 + ... + 206570.

It is an arithmetic number, because the mean of its divisors is an integer number (455028210).

Almost surely, 2^20838347244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20838347244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32762031120).

20838347244 is an abundant number, since it is smaller than the sum of its proper divisors (44685714996).

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

20838347244 is a wasteful number, since it uses less digits than its factorization.

20838347244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238160 (or 238155 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 45.

The spelling of 20838347244 in words is "twenty billion, eight hundred thirty-eight million, three hundred forty-seven thousand, two hundred forty-four".