20432736 has 60 divisors (see below), whose sum is σ = 60099732. Its totient is φ = 6810048.

The previous prime is 20432729. The next prime is 20432749. The reversal of 20432736 is 63723402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1350 + ... + 6533.

Almost surely, 2^20432736 is an apocalyptic number.

It is an amenable number.

20432736 is an abundant number, since it is smaller than the sum of its proper divisors (39666996).

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

20432736 is an equidigital number, since it uses as much as digits as its factorization.

20432736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7905 (or 7888 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 20432736 is about 4520.2583996935. The cubic root of 20432736 is about 273.3855198129.

The spelling of 20432736 in words is "twenty million, four hundred thirty-two thousand, seven hundred thirty-six".