20438466 has 16 divisors (see below), whose sum is σ = 40976544. Its totient is φ = 6796224.

The previous prime is 20438447. The next prime is 20438497. The reversal of 20438466 is 66483402.

It is a super-3 number, since 3×20438466³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (2561034).

Almost surely, 2^20438466 is an apocalyptic number.

20438466 is an abundant number, since it is smaller than the sum of its proper divisors (20538078).

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

20438466 is a wasteful number, since it uses less digits than its factorization.

20438466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8305.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 20438466 is about 4520.8921685880. The cubic root of 20438466 is about 273.4110728049.

The spelling of 20438466 in words is "twenty million, four hundred thirty-eight thousand, four hundred sixty-six".