20049973 has 2 divisors, whose sum is σ = 20049974. Its totient is φ = 20049972.

The previous prime is 20049971. The next prime is 20049977. The reversal of 20049973 is 37994002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11881809 + 8168164 = 3447^2 + 2858^2 .

It is a cyclic number.

It is not a de Polignac number, because 20049973 - 2¹ = 20049971 is a prime.

Together with 20049971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20049971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10024986 + 10024987.

It is an arithmetic number, because the mean of its divisors is an integer number (10024987).

Almost surely, 2^20049973 is an apocalyptic number.

It is an amenable number.

20049973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20049973 is an equidigital number, since it uses as much as digits as its factorization.

20049973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20049973 is about 4477.7196205211. The cubic root of 20049973 is about 271.6676529420.

The spelling of 20049973 in words is "twenty million, forty-nine thousand, nine hundred seventy-three".