20964075 has 24 divisors (see below), whose sum is σ = 37813056. Its totient is φ = 10164000.

The previous prime is 20964059. The next prime is 20964103. The reversal of 20964075 is 57046902.

It is not a de Polignac number, because 20964075 - 2⁴ = 20964059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11881 + ... + 13530.

It is an arithmetic number, because the mean of its divisors is an integer number (1575544).

Almost surely, 2^20964075 is an apocalyptic number.

20964075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20964075 is a deficient number, since it is larger than the sum of its proper divisors (16848981).

20964075 is a wasteful number, since it uses less digits than its factorization.

20964075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25435 (or 25430 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20964075 is about 4578.6542782787. The cubic root of 20964075 is about 275.7350034737.

The spelling of 20964075 in words is "twenty million, nine hundred sixty-four thousand, seventy-five".