20573726 has 4 divisors (see below), whose sum is σ = 30860592. Its totient is φ = 10286862.

The previous prime is 20573719. The next prime is 20573743. The reversal of 20573726 is 62737502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62737502 = 2 ⋅31368751.

It is a junction number, because it is equal to n+sod(n) for n = 20573692 and 20573701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5143430 + ... + 5143433.

It is an arithmetic number, because the mean of its divisors is an integer number (7715148).

Almost surely, 2^20573726 is an apocalyptic number.

20573726 is a deficient number, since it is larger than the sum of its proper divisors (10286866).

20573726 is a wasteful number, since it uses less digits than its factorization.

20573726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10286865.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 20573726 is about 4535.8269367338. The cubic root of 20573726 is about 274.0128841154.

The spelling of 20573726 in words is "twenty million, five hundred seventy-three thousand, seven hundred twenty-six".