20409954 has 8 divisors (see below), whose sum is σ = 40819920. Its totient is φ = 6803316.

The previous prime is 20409953. The next prime is 20409959. The reversal of 20409954 is 45990402.

It is a sphenic number, since it is the product of 3 distinct primes.

20409954 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20409953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1700824 + ... + 1700835.

It is an arithmetic number, because the mean of its divisors is an integer number (5102490).

Almost surely, 2^20409954 is an apocalyptic number.

20409954 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20409954 is a wasteful number, since it uses less digits than its factorization.

20409954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401664.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20409954 is about 4517.7377081898. The cubic root of 20409954 is about 273.2838759746.

The spelling of 20409954 in words is "twenty million, four hundred nine thousand, nine hundred fifty-four".