20447101 has 2 divisors, whose sum is σ = 20447102. Its totient is φ = 20447100.

The previous prime is 20447083. The next prime is 20447111. The reversal of 20447101 is 10174402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14830201 + 5616900 = 3851^2 + 2370^2 .

It is a cyclic number.

It is not a de Polignac number, because 20447101 - 2¹³ = 20438909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20447111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10223550 + 10223551.

It is an arithmetic number, because the mean of its divisors is an integer number (10223551).

Almost surely, 2^20447101 is an apocalyptic number.

It is an amenable number.

20447101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20447101 is an equidigital number, since it uses as much as digits as its factorization.

20447101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 20447101 is about 4521.8470783519. The cubic root of 20447101 is about 273.4495716532.

The spelling of 20447101 in words is "twenty million, four hundred forty-seven thousand, one hundred one".