20447132 has 12 divisors (see below), whose sum is σ = 35814240. Its totient is φ = 10214496.

The previous prime is 20447131. The next prime is 20447159. The reversal of 20447132 is 23174402.

It is a junction number, because it is equal to n+sod(n) for n = 20447098 and 20447107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20447131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7133 + ... + 9579.

It is an arithmetic number, because the mean of its divisors is an integer number (2984520).

Almost surely, 2^20447132 is an apocalyptic number.

It is an amenable number.

20447132 is a deficient number, since it is larger than the sum of its proper divisors (15367108).

20447132 is a wasteful number, since it uses less digits than its factorization.

20447132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540 (or 4538 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20447132 is about 4521.8505061534. The cubic root of 20447132 is about 273.4497098461.

The spelling of 20447132 in words is "twenty million, four hundred forty-seven thousand, one hundred thirty-two".