20749544230 has 16 divisors (see below), whose sum is σ = 37906631280. Its totient is φ = 8175939552.

The previous prime is 20749544197. The next prime is 20749544239. The reversal of 20749544230 is 3244594702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20749544239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15484065 + ... + 15485404.

It is an arithmetic number, because the mean of its divisors is an integer number (2369164455).

Almost surely, 2^20749544230 is an apocalyptic number.

20749544230 is a deficient number, since it is larger than the sum of its proper divisors (17157087050).

20749544230 is a wasteful number, since it uses less digits than its factorization.

20749544230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30969543.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 20749544230 in words is "twenty billion, seven hundred forty-nine million, five hundred forty-four thousand, two hundred thirty".