20922857370801 has 81 divisors (see below), whose sum is σ = 31678310584011. Its totient is φ = 13818400391376.

The previous prime is 20922857370773. The next prime is 20922857370829. The reversal of 20922857370801 is 10807375822902.

The square root of 20922857370801 is 4574151.

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

20922857370801 is a `hidden beast` number, since 209 + 228 + 5 + 73 + 70 + 80 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (20922857370773) and next prime (20922857370829).

It can be written as a sum of positive squares in only one way, i.e., 2451256791201 + 18471600579600 = 1565649^2 + 4297860^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is not a de Polignac number, because 20922857370801 - 2¹⁷ = 20922857239729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20922857370871) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 55205428230 + ... + 55205428608.

Almost surely, 2^{20922857370801} is an apocalyptic number.

20922857370801 is the 4574151-st square number.

20922857370801 is the 2287076-th centered octagonal number.

It is an amenable number.

20922857370801 is a deficient number, since it is larger than the sum of its proper divisors (10755453213210).

20922857370801 is an frugal number, since it uses more digits than its factorization.

20922857370801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 20922857370801 in words is "twenty trillion, nine hundred twenty-two billion, eight hundred fifty-seven million, three hundred seventy thousand, eight hundred one".