19722727125 has 128 divisors (see below), whose sum is σ = 38984924160. Its totient is φ = 9814464000.

The previous prime is 19722727109. The next prime is 19722727127. The reversal of 19722727125 is 52172722791.

It is not a de Polignac number, because 19722727125 - 2⁴ = 19722727109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19722727127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3179527 + ... + 3185723.

It is an arithmetic number, because the mean of its divisors is an integer number (304569720).

Almost surely, 2^19722727125 is an apocalyptic number.

19722727125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19722727125 is a deficient number, since it is larger than the sum of its proper divisors (19262197035).

19722727125 is a wasteful number, since it uses less digits than its factorization.

19722727125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285 (or 6269 counting only the distinct ones).

The product of its digits is 246960, while the sum is 45.

The spelling of 19722727125 in words is "nineteen billion, seven hundred twenty-two million, seven hundred twenty-seven thousand, one hundred twenty-five".