20478054 has 16 divisors (see below), whose sum is σ = 41064048. Its totient is φ = 6808032.

The previous prime is 20478043. The next prime is 20478061. The reversal of 20478054 is 45087402.

It is a congruent number.

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, 1917 + ... + 6680.

It is an arithmetic number, because the mean of its divisors is an integer number (2566503).

Almost surely, 2^20478054 is an apocalyptic number.

20478054 is an abundant number, since it is smaller than the sum of its proper divisors (20585994).

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

20478054 is a wasteful number, since it uses less digits than its factorization.

20478054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8999.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20478054 is about 4525.2683898306. The cubic root of 20478054 is about 273.5874855344.

It can be divided in two parts, 2047 and 8054, that added together give a palindrome (10101).

The spelling of 20478054 in words is "twenty million, four hundred seventy-eight thousand, fifty-four".