20746373 has 4 divisors (see below), whose sum is σ = 21137868. Its totient is φ = 20354880.

The previous prime is 20746367. The next prime is 20746379. The reversal of 20746373 is 37364702.

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

It is an interprime number because it is at equal distance from previous prime (20746367) and next prime (20746379).

It can be written as a sum of positive squares in 2 ways, for example, as 11303044 + 9443329 = 3362^2 + 3073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20746373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746379) 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, 195668 + ... + 195773.

It is an arithmetic number, because the mean of its divisors is an integer number (5284467).

Almost surely, 2^20746373 is an apocalyptic number.

It is an amenable number.

20746373 is a deficient number, since it is larger than the sum of its proper divisors (391495).

20746373 is an equidigital number, since it uses as much as digits as its factorization.

20746373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391494.

The product of its (nonzero) digits is 21168, while the sum is 32.

The square root of 20746373 is about 4554.8186572025. The cubic root of 20746373 is about 274.7772212275. Note that the first 3 decimals are identical.

The spelling of 20746373 in words is "twenty million, seven hundred forty-six thousand, three hundred seventy-three".