20447141 has 24 divisors (see below), whose sum is σ = 25614144. Its totient is φ = 16124160.

The previous prime is 20447131. The next prime is 20447159. The reversal of 20447141 is 14174402.

It is a happy number.

It is not a de Polignac number, because 20447141 - 2²² = 16252837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20447101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31280 + ... + 31926.

It is an arithmetic number, because the mean of its divisors is an integer number (1067256).

Almost surely, 2^20447141 is an apocalyptic number.

It is an amenable number.

20447141 is a deficient number, since it is larger than the sum of its proper divisors (5167003).

20447141 is a wasteful number, since it uses less digits than its factorization.

20447141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 20447141 is about 4521.8515013211. The cubic root of 20447141 is about 273.4497499666.

The spelling of 20447141 in words is "twenty million, four hundred forty-seven thousand, one hundred forty-one".