20775603 has 4 divisors (see below), whose sum is σ = 27700808. Its totient is φ = 13850400.

The previous prime is 20775593. The next prime is 20775613. The reversal of 20775603 is 30657702.

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 (20775593) and next prime (20775613).

It is not a de Polignac number, because 20775603 - 2⁶ = 20775539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20775613) 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, 3462598 + ... + 3462603.

It is an arithmetic number, because the mean of its divisors is an integer number (6925202).

Almost surely, 2^20775603 is an apocalyptic number.

20775603 is a deficient number, since it is larger than the sum of its proper divisors (6925205).

20775603 is an equidigital number, since it uses as much as digits as its factorization.

20775603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6925204.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 20775603 is about 4558.0262175639. The cubic root of 20775603 is about 274.9062071326.

The spelling of 20775603 in words is "twenty million, seven hundred seventy-five thousand, six hundred three".