20099274 has 32 divisors (see below), whose sum is σ = 43653120. Its totient is φ = 6132672.

The previous prime is 20099269. The next prime is 20099311. The reversal of 20099274 is 47299002.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8892 + ... + 10920.

It is an arithmetic number, because the mean of its divisors is an integer number (1364160).

Almost surely, 2^20099274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20099274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21826560).

20099274 is an abundant number, since it is smaller than the sum of its proper divisors (23553846).

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

20099274 is a wasteful number, since it uses less digits than its factorization.

20099274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 20099274 is about 4483.2213864586. The cubic root of 20099274 is about 271.8901390962.

The spelling of 20099274 in words is "twenty million, ninety-nine thousand, two hundred seventy-four".