20753859844 has 9 divisors (see below), whose sum is σ = 36319758951. Its totient is φ = 10376785860.

The previous prime is 20753859827. The next prime is 20753859851. The reversal of 20753859844 is 44895835702.

The square root of 20753859844 is 144062.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 252109 + ... + 324139.

Almost surely, 2^20753859844 is an apocalyptic number.

20753859844 is the 144062-nd square number.

It is an amenable number.

20753859844 is a deficient number, since it is larger than the sum of its proper divisors (15565899107).

20753859844 is an frugal number, since it uses more digits than its factorization.

20753859844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144066 (or 72033 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 20753859844 in words is "twenty billion, seven hundred fifty-three million, eight hundred fifty-nine thousand, eight hundred forty-four".