20406468 has 24 divisors (see below), whose sum is σ = 47712672. Its totient is φ = 6788224.

The previous prime is 20406461. The next prime is 20406521. The reversal of 20406468 is 86460402.

It is not an unprimeable number, because it can be changed into a prime (20406461) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5596 + ... + 8492.

It is an arithmetic number, because the mean of its divisors is an integer number (1988028).

Almost surely, 2^20406468 is an apocalyptic number.

It is an amenable number.

20406468 is an abundant number, since it is smaller than the sum of its proper divisors (27306204).

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

20406468 is a wasteful number, since it uses less digits than its factorization.

20406468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491 (or 3489 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 20406468 is about 4517.3518791434. The cubic root of 20406468 is about 273.2683162166.

The spelling of 20406468 in words is "twenty million, four hundred six thousand, four hundred sixty-eight".