20520703 has 8 divisors (see below), whose sum is σ = 24686720. Its totient is φ = 16663320.

The previous prime is 20520701. The next prime is 20520743. The reversal of 20520703 is 30702502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20520703 - 2¹ = 20520701 is a prime.

It is a super-2 number, since 2×20520703² = 842198503228418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77013 + ... + 77278.

It is an arithmetic number, because the mean of its divisors is an integer number (3085840).

Almost surely, 2^20520703 is an apocalyptic number.

20520703 is a deficient number, since it is larger than the sum of its proper divisors (4166017).

20520703 is a wasteful number, since it uses less digits than its factorization.

20520703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154317.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 20520703 is about 4529.9782560185. The cubic root of 20520703 is about 273.7772845208. Note that the first 3 decimals are identical.

The spelling of 20520703 in words is "twenty million, five hundred twenty thousand, seven hundred three".