20754761 has 2 divisors, whose sum is σ = 20754762. Its totient is φ = 20754760.

The previous prime is 20754757. The next prime is 20754787. The reversal of 20754761 is 16745702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 1394761 = 4400^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 20754761 - 2² = 20754757 is a prime.

It is not a weakly prime, because it can be changed into another prime (20754361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10377380 + 10377381.

It is an arithmetic number, because the mean of its divisors is an integer number (10377381).

Almost surely, 2^20754761 is an apocalyptic number.

It is an amenable number.

20754761 is a deficient number, since it is larger than the sum of its proper divisors (1).

20754761 is an equidigital number, since it uses as much as digits as its factorization.

20754761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20754761 is about 4555.7393472410. The cubic root of 20754761 is about 274.8142481137.

The spelling of 20754761 in words is "twenty million, seven hundred fifty-four thousand, seven hundred sixty-one".