20457722727 has 24 divisors (see below), whose sum is σ = 32599305648. Its totient is φ = 12282307200.

The previous prime is 20457722713. The next prime is 20457722743. The reversal of 20457722727 is 72722775402.

20457722727 is a `hidden beast` number, since 2 + 0 + 4 + 577 + 2 + 2 + 72 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20457722727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457722707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2127549 + ... + 2137142.

It is an arithmetic number, because the mean of its divisors is an integer number (1358304402).

Almost surely, 2^20457722727 is an apocalyptic number.

20457722727 is a deficient number, since it is larger than the sum of its proper divisors (12141582921).

20457722727 is a wasteful number, since it uses less digits than its factorization.

20457722727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264751 (or 4264748 counting only the distinct ones).

The product of its (nonzero) digits is 768320, while the sum is 45.

The spelling of 20457722727 in words is "twenty billion, four hundred fifty-seven million, seven hundred twenty-two thousand, seven hundred twenty-seven".