20748235 has 16 divisors (see below), whose sum is σ = 25757280. Its totient is φ = 16035840.

The previous prime is 20748229. The next prime is 20748241. The reversal of 20748235 is 53284702.

It is an interprime number because it is at equal distance from previous prime (20748229) and next prime (20748241).

It is a de Polignac number, because none of the positive numbers 2^k-20748235 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20748197 and 20748206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17419 + ... + 18571.

It is an arithmetic number, because the mean of its divisors is an integer number (1609830).

Almost surely, 2^20748235 is an apocalyptic number.

20748235 is a deficient number, since it is larger than the sum of its proper divisors (5009045).

20748235 is a wasteful number, since it uses less digits than its factorization.

20748235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20748235 is about 4555.0230515333. The cubic root of 20748235 is about 274.7854414576.

The spelling of 20748235 in words is "twenty million, seven hundred forty-eight thousand, two hundred thirty-five".