20748075 has 24 divisors (see below), whose sum is σ = 36323568. Its totient is φ = 10414080.

The previous prime is 20748071. The next prime is 20748097. The reversal of 20748075 is 57084702.

It is not a de Polignac number, because 20748075 - 2² = 20748071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20748071) 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, 6862 + ... + 9411.

It is an arithmetic number, because the mean of its divisors is an integer number (1513482).

Almost surely, 2^20748075 is an apocalyptic number.

20748075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20748075 is a deficient number, since it is larger than the sum of its proper divisors (15575493).

20748075 is a wasteful number, since it uses less digits than its factorization.

20748075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16303 (or 16298 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 20748075 is about 4555.0054884709. The cubic root of 20748075 is about 274.7847351199.

The spelling of 20748075 in words is "twenty million, seven hundred forty-eight thousand, seventy-five".