20750537 has 2 divisors, whose sum is σ = 20750538. Its totient is φ = 20750536.

The previous prime is 20750479. The next prime is 20750539. The reversal of 20750537 is 73505702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18139081 + 2611456 = 4259^2 + 1616^2 .

It is a cyclic number.

It is not a de Polignac number, because 20750537 - 2⁶ = 20750473 is a prime.

Together with 20750539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20750539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10375268 + 10375269.

It is an arithmetic number, because the mean of its divisors is an integer number (10375269).

Almost surely, 2^20750537 is an apocalyptic number.

It is an amenable number.

20750537 is a deficient number, since it is larger than the sum of its proper divisors (1).

20750537 is an equidigital number, since it uses as much as digits as its factorization.

20750537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 20750537 is about 4555.2757325984. The cubic root of 20750537 is about 274.7956034898.

The spelling of 20750537 in words is "twenty million, seven hundred fifty thousand, five hundred thirty-seven".