20992296 has 64 divisors (see below), whose sum is σ = 57496320. Its totient is φ = 6347520.

The previous prime is 20992291. The next prime is 20992303. The reversal of 20992296 is 69229902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20992291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18481 + ... + 19583.

It is an arithmetic number, because the mean of its divisors is an integer number (898380).

Almost surely, 2^20992296 is an apocalyptic number.

20992296 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20992296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28748160).

20992296 is an abundant number, since it is smaller than the sum of its proper divisors (36504024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20992296 is a wasteful number, since it uses less digits than its factorization.

20992296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 1182 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 20992296 is about 4581.7350425357. The cubic root of 20992296 is about 275.8586758103.

The spelling of 20992296 in words is "twenty million, nine hundred ninety-two thousand, two hundred ninety-six".