20037973 has 2 divisors, whose sum is σ = 20037974. Its totient is φ = 20037972.

The previous prime is 20037961. The next prime is 20038009. The reversal of 20037973 is 37973002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19158129 + 879844 = 4377^2 + 938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20037973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20037923) 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, 10018986 + 10018987.

It is an arithmetic number, because the mean of its divisors is an integer number (10018987).

Almost surely, 2^20037973 is an apocalyptic number.

It is an amenable number.

20037973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20037973 is an equidigital number, since it uses as much as digits as its factorization.

20037973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 31.

The square root of 20037973 is about 4476.3794521912. The cubic root of 20037973 is about 271.6134440173.

The spelling of 20037973 in words is "twenty million, thirty-seven thousand, nine hundred seventy-three".