20447146 has 16 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 9807280.

The previous prime is 20447131. The next prime is 20447159. The reversal of 20447146 is 64174402.

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, 8631 + ... + 10741.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^20447146 is an apocalyptic number.

20447146 is a deficient number, since it is larger than the sum of its proper divisors (11486294).

20447146 is a wasteful number, since it uses less digits than its factorization.

20447146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20447146 is about 4521.8520541920. The cubic root of 20447146 is about 273.4497722557.

The spelling of 20447146 in words is "twenty million, four hundred forty-seven thousand, one hundred forty-six".