20447032 has 16 divisors (see below), whose sum is σ = 38480760. Its totient is φ = 10185504.

The previous prime is 20447003. The next prime is 20447057. The reversal of 20447032 is 23074402.

It is a super-2 number, since 2×20447032² = 836162235218048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20446994 and 20447012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2398 + ... + 6829.

Almost surely, 2^20447032 is an apocalyptic number.

It is an amenable number.

20447032 is a deficient number, since it is larger than the sum of its proper divisors (18033728).

20447032 is a wasteful number, since it uses less digits than its factorization.

20447032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9510 (or 9506 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20447032 is about 4521.8394487200. The cubic root of 20447032 is about 273.4492640620.

The spelling of 20447032 in words is "twenty million, four hundred forty-seven thousand, thirty-two".