20748375 has 24 divisors (see below), whose sum is σ = 37404432. Its totient is φ = 11065200.

The previous prime is 20748373. The next prime is 20748383. The reversal of 20748375 is 57384702.

It is not a de Polignac number, because 20748375 - 2¹ = 20748373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20748373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8097 + ... + 10346.

It is an arithmetic number, because the mean of its divisors is an integer number (1558518).

Almost surely, 2^20748375 is an apocalyptic number.

20748375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20748375 is a deficient number, since it is larger than the sum of its proper divisors (16656057).

20748375 is a wasteful number, since it uses less digits than its factorization.

20748375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18464 (or 18451 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 20748375 is about 4555.0384191574. The cubic root of 20748375 is about 274.7860595002.

The spelling of 20748375 in words is "twenty million, seven hundred forty-eight thousand, three hundred seventy-five".