20734375 has 14 divisors (see below), whose sum is σ = 25937168. Its totient is φ = 16575000.

The previous prime is 20734369. The next prime is 20734403. The reversal of 20734375 is 57343702.

It is not a de Polignac number, because 20734375 - 2³ = 20734367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 13 ways as a sum of consecutive naturals, for example, 14962 + ... + 16288.

Almost surely, 2^20734375 is an apocalyptic number.

20734375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20734375 is a deficient number, since it is larger than the sum of its proper divisors (5202793).

20734375 is an frugal number, since it uses more digits than its factorization.

20734375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1332 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 20734375 is about 4553.5014000217. The cubic root of 20734375 is about 274.7242414796.

The spelling of 20734375 in words is "twenty million, seven hundred thirty-four thousand, three hundred seventy-five".