20040432 has 20 divisors (see below), whose sum is σ = 51771240. Its totient is φ = 6680128.

The previous prime is 20040409. The next prime is 20040443. The reversal of 20040432 is 23404002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208707 + ... + 208802.

It is an arithmetic number, because the mean of its divisors is an integer number (2588562).

Almost surely, 2^20040432 is an apocalyptic number.

It is an amenable number.

20040432 is an abundant number, since it is smaller than the sum of its proper divisors (31730808).

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

20040432 is a wasteful number, since it uses less digits than its factorization.

20040432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417520 (or 417514 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20040432 is about 4476.6541077014. The cubic root of 20040432 is about 271.6245540922.

Adding to 20040432 its reverse (23404002), we get a palindrome (43444434).

The spelling of 20040432 in words is "twenty million, forty thousand, four hundred thirty-two".