20964299 has 4 divisors (see below), whose sum is σ = 20985120. Its totient is φ = 20943480.

The previous prime is 20964287. The next prime is 20964331. The reversal of 20964299 is 99246902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99246902 = 2 ⋅49623451.

It is a cyclic number.

It is not a de Polignac number, because 20964299 - 2⁴ = 20964283 is a prime.

It is a super-2 number, since 2×20964299² = 879003665122802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20964269) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8819 + ... + 10940.

It is an arithmetic number, because the mean of its divisors is an integer number (5246280).

Almost surely, 2^20964299 is an apocalyptic number.

20964299 is a deficient number, since it is larger than the sum of its proper divisors (20821).

20964299 is a wasteful number, since it uses less digits than its factorization.

20964299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20820.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 20964299 is about 4578.6787395492. The cubic root of 20964299 is about 275.7359855413.

The spelling of 20964299 in words is "twenty million, nine hundred sixty-four thousand, two hundred ninety-nine".