20992827 has 4 divisors (see below), whose sum is σ = 27990440. Its totient is φ = 13995216.

The previous prime is 20992819. The next prime is 20992843. The reversal of 20992827 is 72829902.

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

It is not a de Polignac number, because 20992827 - 2³ = 20992819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20992817) 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, 3498802 + ... + 3498807.

It is an arithmetic number, because the mean of its divisors is an integer number (6997610).

Almost surely, 2^20992827 is an apocalyptic number.

20992827 is a deficient number, since it is larger than the sum of its proper divisors (6997613).

20992827 is an equidigital number, since it uses as much as digits as its factorization.

20992827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6997612.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20992827 is about 4581.7929896494. The cubic root of 20992827 is about 275.8610017385.

The spelling of 20992827 in words is "twenty million, nine hundred ninety-two thousand, eight hundred twenty-seven".