20432536 has 8 divisors (see below), whose sum is σ = 38311020. Its totient is φ = 10216264.

The previous prime is 20432527. The next prime is 20432551. The reversal of 20432536 is 63523402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20432536.

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 as a sum of consecutive naturals, namely, 1277026 + ... + 1277041.

Almost surely, 2^20432536 is an apocalyptic number.

It is an amenable number.

20432536 is a deficient number, since it is larger than the sum of its proper divisors (17878484).

20432536 is a wasteful number, since it uses less digits than its factorization.

20432536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554073 (or 2554069 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20432536 is about 4520.2362770103. The cubic root of 20432536 is about 273.3846278246.

Adding to 20432536 its reverse (63523402), we get a palindrome (83955938).

It can be divided in two parts, 20 and 432536, that multiplied together give a triangular number (8650720 = T₄₁₅₉).

The spelling of 20432536 in words is "twenty million, four hundred thirty-two thousand, five hundred thirty-six".