20756101 has 2 divisors, whose sum is σ = 20756102. Its totient is φ = 20756100.

The previous prime is 20756089. The next prime is 20756129. The reversal of 20756101 is 10165702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12496225 + 8259876 = 3535^2 + 2874^2 .

It is a cyclic number.

It is not a de Polignac number, because 20756101 - 2²³ = 12367493 is a prime.

It is a super-3 number, since 3×20756101³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20756191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10378050 + 10378051.

It is an arithmetic number, because the mean of its divisors is an integer number (10378051).

Almost surely, 2^20756101 is an apocalyptic number.

It is an amenable number.

20756101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20756101 is an equidigital number, since it uses as much as digits as its factorization.

20756101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 20756101 is about 4555.8864121047. The cubic root of 20756101 is about 274.8201623096.

The spelling of 20756101 in words is "twenty million, seven hundred fifty-six thousand, one hundred one".