20081478 has 8 divisors (see below), whose sum is σ = 40162968. Its totient is φ = 6693824.

The previous prime is 20081449. The next prime is 20081483. The reversal of 20081478 is 87418002.

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

20081478 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673451 + ... + 1673462.

It is an arithmetic number, because the mean of its divisors is an integer number (5020371).

Almost surely, 2^20081478 is an apocalyptic number.

20081478 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.

20081478 is a wasteful number, since it uses less digits than its factorization.

20081478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346918.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20081478 is about 4481.2362133679. The cubic root of 20081478 is about 271.8098710951.

It can be divided in two parts, 2008 and 1478, that added together give a triangular number (3486 = T₈₃).

The spelling of 20081478 in words is "twenty million, eighty-one thousand, four hundred seventy-eight".