20972703 has 4 divisors (see below), whose sum is σ = 27963608. Its totient is φ = 13981800.

The previous prime is 20972663. The next prime is 20972729. The reversal of 20972703 is 30727902.

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

It is not a de Polignac number, because 20972703 - 2⁶ = 20972639 is a prime.

It is a super-2 number, since 2×20972703² = 879708542252418, 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 (20972753) 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, 3495448 + ... + 3495453.

It is an arithmetic number, because the mean of its divisors is an integer number (6990902).

Almost surely, 2^20972703 is an apocalyptic number.

20972703 is a deficient number, since it is larger than the sum of its proper divisors (6990905).

20972703 is an equidigital number, since it uses as much as digits as its factorization.

20972703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990904.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 20972703 is about 4579.5963795950. The cubic root of 20972703 is about 275.7728255624.

The spelling of 20972703 in words is "twenty million, nine hundred seventy-two thousand, seven hundred three".