20405054 has 8 divisors (see below), whose sum is σ = 30831408. Its totient is φ = 10127920.

The previous prime is 20405041. The next prime is 20405057. The reversal of 20405054 is 45050402.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20405057) 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, 36962 + ... + 37509.

It is an arithmetic number, because the mean of its divisors is an integer number (3853926).

Almost surely, 2^20405054 is an apocalyptic number.

20405054 is a deficient number, since it is larger than the sum of its proper divisors (10426354).

20405054 is a wasteful number, since it uses less digits than its factorization.

20405054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74610.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20405054 is about 4517.1953688102. The cubic root of 20405054 is about 273.2620043237.

Adding to 20405054 its reverse (45050402), we get a palindrome (65455456).

The spelling of 20405054 in words is "twenty million, four hundred five thousand, fifty-four".