20003632 has 20 divisors (see below), whose sum is σ = 42280776. Its totient is φ = 9092480.

The previous prime is 20003609. The next prime is 20003663. The reversal of 20003632 is 23630002.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56653 + ... + 57004.

Almost surely, 2^20003632 is an apocalyptic number.

20003632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20003632 is an abundant number, since it is smaller than the sum of its proper divisors (22277144).

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

20003632 is a wasteful number, since it uses less digits than its factorization.

20003632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113676 (or 113670 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20003632 is about 4472.5420065104. The cubic root of 20003632 is about 271.4581919396.

Adding to 20003632 its reverse (23630002), we get a palindrome (43633634).

The spelling of 20003632 in words is "twenty million, three thousand, six hundred thirty-two".