20774248 has 32 divisors (see below), whose sum is σ = 42865920. Its totient is φ = 9438000.

The previous prime is 20774233. The next prime is 20774263. The reversal of 20774248 is 84247702.

It is an interprime number because it is at equal distance from previous prime (20774233) and next prime (20774263).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9673 + ... + 11623.

It is an arithmetic number, because the mean of its divisors is an integer number (1339560).

Almost surely, 2^20774248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20774248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21432960).

20774248 is an abundant number, since it is smaller than the sum of its proper divisors (22091672).

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

20774248 is a wasteful number, since it uses less digits than its factorization.

20774248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990 (or 1964 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 20774248 is about 4557.8775762409. The cubic root of 20774248 is about 274.9002304748.

The spelling of 20774248 in words is "twenty million, seven hundred seventy-four thousand, two hundred forty-eight".