20073506 has 4 divisors (see below), whose sum is σ = 30110262. Its totient is φ = 10036752.

The previous prime is 20073463. The next prime is 20073509. The reversal of 20073506 is 60537002.

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

It can be written as a sum of positive squares in only one way, i.e., 10182481 + 9891025 = 3191^2 + 3145^2 .

It is not an unprimeable number, because it can be changed into a prime (20073509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5018375 + ... + 5018378.

Almost surely, 2^20073506 is an apocalyptic number.

20073506 is a deficient number, since it is larger than the sum of its proper divisors (10036756).

20073506 is a wasteful number, since it uses less digits than its factorization.

20073506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10036755.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20073506 is about 4480.3466383752. The cubic root of 20073506 is about 271.7738983927.

The spelling of 20073506 in words is "twenty million, seventy-three thousand, five hundred six".