20838844511 has 8 divisors (see below), whose sum is σ = 22067599824. Its totient is φ = 19610416000.

The previous prime is 20838844487. The next prime is 20838844547. The reversal of 20838844511 is 11544883802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20838844511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20838844571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56261 + ... + 211761.

It is an arithmetic number, because the mean of its divisors is an integer number (2758449978).

Almost surely, 2^20838844511 is an apocalyptic number.

20838844511 is a deficient number, since it is larger than the sum of its proper divisors (1228755313).

20838844511 is a wasteful number, since it uses less digits than its factorization.

20838844511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163401.

The product of its (nonzero) digits is 245760, while the sum is 44.

The spelling of 20838844511 in words is "twenty billion, eight hundred thirty-eight million, eight hundred forty-four thousand, five hundred eleven".