20992367 has 8 divisors (see below), whose sum is σ = 22940112. Its totient is φ = 19051200.

The previous prime is 20992343. The next prime is 20992379. The reversal of 20992367 is 76329902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20992367 - 2⁶ = 20992303 is a prime.

It is a super-3 number, since 3×20992367³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20992367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992337) 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 7 ways as a sum of consecutive naturals, for example, 7067 + ... + 9587.

It is an arithmetic number, because the mean of its divisors is an integer number (2867514).

Almost surely, 2^20992367 is an apocalyptic number.

20992367 is a deficient number, since it is larger than the sum of its proper divisors (1947745).

20992367 is a wasteful number, since it uses less digits than its factorization.

20992367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 20992367 is about 4581.7427906857. The cubic root of 20992367 is about 275.8589868124.

The spelling of 20992367 in words is "twenty million, nine hundred ninety-two thousand, three hundred sixty-seven".