20752549 has 2 divisors, whose sum is σ = 20752550. Its totient is φ = 20752548.

The previous prime is 20752507. The next prime is 20752553. The reversal of 20752549 is 94525702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20088324 + 664225 = 4482^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 20752549 - 2²³ = 12363941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20752559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10376274 + 10376275.

It is an arithmetic number, because the mean of its divisors is an integer number (10376275).

Almost surely, 2^20752549 is an apocalyptic number.

It is an amenable number.

20752549 is a deficient number, since it is larger than the sum of its proper divisors (1).

20752549 is an equidigital number, since it uses as much as digits as its factorization.

20752549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 20752549 is about 4555.4965700788. The cubic root of 20752549 is about 274.8044847199.

It can be divided in two parts, 2075 and 2549, that added together give a square (4624 = 68²).

The spelling of 20752549 in words is "twenty million, seven hundred fifty-two thousand, five hundred forty-nine".