20992319 has 4 divisors (see below), whose sum is σ = 21042840. Its totient is φ = 20941800.

The previous prime is 20992303. The next prime is 20992333. The reversal of 20992319 is 91329902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20992319 - 2⁴ = 20992303 is a prime.

It is a super-2 number, since 2×20992319² = 881354913995522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992379) 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 3 ways as a sum of consecutive naturals, for example, 24632 + ... + 25469.

It is an arithmetic number, because the mean of its divisors is an integer number (5260710).

Almost surely, 2^20992319 is an apocalyptic number.

20992319 is a deficient number, since it is larger than the sum of its proper divisors (50521).

20992319 is an equidigital number, since it uses as much as digits as its factorization.

20992319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50520.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 20992319 is about 4581.7375525012. The cubic root of 20992319 is about 275.8587765575.

The spelling of 20992319 in words is "twenty million, nine hundred ninety-two thousand, three hundred nineteen".