20436732 has 24 divisors (see below), whose sum is σ = 52984400. Its totient is φ = 6812208.

The previous prime is 20436721. The next prime is 20436733. The reversal of 20436732 is 23763402.

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

It is a junction number, because it is equal to n+sod(n) for n = 20436696 and 20436705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20436733) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 94507 + ... + 94722.

Almost surely, 2^20436732 is an apocalyptic number.

It is an amenable number.

20436732 is an abundant number, since it is smaller than the sum of its proper divisors (32547668).

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

20436732 is a wasteful number, since it uses less digits than its factorization.

20436732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189242 (or 189234 counting only the distinct ones).

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

The square root of 20436732 is about 4520.7003882142. The cubic root of 20436732 is about 273.4033405186.

The spelling of 20436732 in words is "twenty million, four hundred thirty-six thousand, seven hundred thirty-two".