20432988 has 36 divisors (see below), whose sum is σ = 51793560. Its totient is φ = 6792096.

The previous prime is 20432981. The next prime is 20433013. The reversal of 20432988 is 88923402.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432981) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19543 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (1438710).

Almost surely, 2^20432988 is an apocalyptic number.

It is an amenable number.

20432988 is an abundant number, since it is smaller than the sum of its proper divisors (31360572).

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

20432988 is a wasteful number, since it uses less digits than its factorization.

20432988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 20432988 is about 4520.2862741203. The cubic root of 20432988 is about 273.3866437098.

The spelling of 20432988 in words is "twenty million, four hundred thirty-two thousand, nine hundred eighty-eight".