21964075 has 12 divisors (see below), whose sum is σ = 31126480. Its totient is φ = 15060960.

The previous prime is 21964073. The next prime is 21964081. The reversal of 21964075 is 57046912.

It is not a de Polignac number, because 21964075 - 2¹ = 21964073 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21964075.

It is not an unprimeable number, because it can be changed into a prime (21964073) 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 11 ways as a sum of consecutive naturals, for example, 62580 + ... + 62929.

Almost surely, 2^21964075 is an apocalyptic number.

21964075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21964075 is a deficient number, since it is larger than the sum of its proper divisors (9162405).

21964075 is a wasteful number, since it uses less digits than its factorization.

21964075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125526 (or 125521 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 21964075 is about 4686.5845772801. The cubic root of 21964075 is about 280.0513298753.

The spelling of 21964075 in words is "twenty-one million, nine hundred sixty-four thousand, seventy-five".