20734775 has 12 divisors (see below), whose sum is σ = 26002800. Its totient is φ = 16399680.

The previous prime is 20734771. The next prime is 20734793. The reversal of 20734775 is 57743702.

It is not a de Polignac number, because 20734775 - 2² = 20734771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2435 + ... + 6884.

It is an arithmetic number, because the mean of its divisors is an integer number (2166900).

Almost surely, 2^20734775 is an apocalyptic number.

20734775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20734775 is a deficient number, since it is larger than the sum of its proper divisors (5268025).

20734775 is an equidigital number, since it uses as much as digits as its factorization.

20734775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9418 (or 9413 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 20734775 is about 4553.5453220540. The cubic root of 20734775 is about 274.7260080949.

The spelling of 20734775 in words is "twenty million, seven hundred thirty-four thousand, seven hundred seventy-five".