20963075 has 24 divisors (see below), whose sum is σ = 30021888. Its totient is φ = 14222880.

The previous prime is 20963071. The next prime is 20963093. The reversal of 20963075 is 57036902.

It is not a de Polignac number, because 20963075 - 2² = 20963071 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20963071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17444 + ... + 18606.

It is an arithmetic number, because the mean of its divisors is an integer number (1250912).

Almost surely, 2^20963075 is an apocalyptic number.

20963075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20963075 is a deficient number, since it is larger than the sum of its proper divisors (9058813).

20963075 is a wasteful number, since it uses less digits than its factorization.

20963075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20963075 is about 4578.5450745843. The cubic root of 20963075 is about 275.7306191577.

Adding to 20963075 its reverse (57036902), we get a palindrome (77999977).

The spelling of 20963075 in words is "twenty million, nine hundred sixty-three thousand, seventy-five".