20750975 has 24 divisors (see below), whose sum is σ = 29581440. Its totient is φ = 14145120.

The previous prime is 20750971. The next prime is 20751001. The reversal of 20750975 is 57905702.

It is not a de Polignac number, because 20750975 - 2² = 20750971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750971) 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, 49316 + ... + 49734.

It is an arithmetic number, because the mean of its divisors is an integer number (1232560).

Almost surely, 2^20750975 is an apocalyptic number.

20750975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20750975 is a deficient number, since it is larger than the sum of its proper divisors (8830465).

20750975 is a wasteful number, since it uses less digits than its factorization.

20750975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 20750975 is about 4555.3238084685. The cubic root of 20750975 is about 274.7975369277.

The spelling of 20750975 in words is "twenty million, seven hundred fifty thousand, nine hundred seventy-five".