20491296 has 48 divisors (see below), whose sum is σ = 61475904. Its totient is φ = 5854464.

The previous prime is 20491283. The next prime is 20491301. The reversal of 20491296 is 69219402.

It is a tau number, because it is divible by the number of its divisors (48).

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, 14575 + ... + 15918.

It is an arithmetic number, because the mean of its divisors is an integer number (1280748).

Almost surely, 2^20491296 is an apocalyptic number.

It is an amenable number.

20491296 is an abundant number, since it is smaller than the sum of its proper divisors (40984608).

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

20491296 is a wasteful number, since it uses less digits than its factorization.

20491296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30513 (or 30505 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 20491296 is about 4526.7312710166. The cubic root of 20491296 is about 273.6464440153.

The spelling of 20491296 in words is "twenty million, four hundred ninety-one thousand, two hundred ninety-six".