20487632 has 40 divisors (see below), whose sum is σ = 44059680. Its totient is φ = 9150080.

The previous prime is 20487631. The next prime is 20487667. The reversal of 20487632 is 23678402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9398 + ... + 11370.

It is an arithmetic number, because the mean of its divisors is an integer number (1101492).

Almost surely, 2^20487632 is an apocalyptic number.

20487632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20487632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22029840).

20487632 is an abundant number, since it is smaller than the sum of its proper divisors (23572048).

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

20487632 is a wasteful number, since it uses less digits than its factorization.

20487632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051 (or 2045 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20487632 is about 4526.3265458869. The cubic root of 20487632 is about 273.6301330194.

The spelling of 20487632 in words is "twenty million, four hundred eighty-seven thousand, six hundred thirty-two".