20438432 has 24 divisors (see below), whose sum is σ = 45986976. Its totient is φ = 8759232.

The previous prime is 20438419. The next prime is 20438441. The reversal of 20438432 is 23483402.

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, 45398 + ... + 45845.

It is an arithmetic number, because the mean of its divisors is an integer number (1916124).

Almost surely, 2^20438432 is an apocalyptic number.

It is an amenable number.

20438432 is an abundant number, since it is smaller than the sum of its proper divisors (25548544).

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

20438432 is an equidigital number, since it uses as much as digits as its factorization.

20438432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91260 (or 91252 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 20438432 is about 4520.8884082667. Note that the first 3 decimals coincide. The cubic root of 20438432 is about 273.4109211956.

The spelling of 20438432 in words is "twenty million, four hundred thirty-eight thousand, four hundred thirty-two".