20737373 has 4 divisors (see below), whose sum is σ = 20876700. Its totient is φ = 20598048.

The previous prime is 20737361. The next prime is 20737397. The reversal of 20737373 is 37373702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1006009 + 19731364 = 1003^2 + 4442^2 .

It is a cyclic number.

It is not a de Polignac number, because 20737373 - 2¹⁰ = 20736349 is a prime.

It is a super-2 number, since 2×20737373² = 860077277882258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20737573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69440 + ... + 69737.

It is an arithmetic number, because the mean of its divisors is an integer number (5219175).

Almost surely, 2^20737373 is an apocalyptic number.

It is an amenable number.

20737373 is a deficient number, since it is larger than the sum of its proper divisors (139327).

20737373 is a wasteful number, since it uses less digits than its factorization.

20737373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139326.

The product of its (nonzero) digits is 18522, while the sum is 32.

The square root of 20737373 is about 4553.8305853424. The cubic root of 20737373 is about 274.7374817080.

It can be divided in two parts, 207 and 37373, that multiplied together give a triangular number (7736211 = T₃₉₃₃).

The spelling of 20737373 in words is "twenty million, seven hundred thirty-seven thousand, three hundred seventy-three".