20746375 has 32 divisors (see below), whose sum is σ = 29562624. Its totient is φ = 14400000.

The previous prime is 20746367. The next prime is 20746379. The reversal of 20746375 is 57364702.

It is a happy number.

It is not a de Polignac number, because 20746375 - 2³ = 20746367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20746375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27250 + ... + 28000.

It is an arithmetic number, because the mean of its divisors is an integer number (923832).

Almost surely, 2^20746375 is an apocalyptic number.

20746375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20746375 is a deficient number, since it is larger than the sum of its proper divisors (8816249).

20746375 is a wasteful number, since it uses less digits than its factorization.

20746375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20746375 is about 4554.8188767502. The cubic root of 20746375 is about 274.7772300572. Note that the first 3 decimals are identical.

The spelling of 20746375 in words is "twenty million, seven hundred forty-six thousand, three hundred seventy-five".