20271384 has 160 divisors (see below), whose sum is σ = 67082400. Its totient is φ = 5598720.

The previous prime is 20271373. The next prime is 20271401. The reversal of 20271384 is 48317202.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 185922 + ... + 186030.

It is an arithmetic number, because the mean of its divisors is an integer number (419265).

Almost surely, 2^20271384 is an apocalyptic number.

20271384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20271384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33541200).

20271384 is an abundant number, since it is smaller than the sum of its proper divisors (46811016).

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

20271384 is a wasteful number, since it uses less digits than its factorization.

20271384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20271384 is about 4502.3753730670. The cubic root of 20271384 is about 272.6639991396.

Adding to 20271384 its reverse (48317202), we get a palindrome (68588586).

The spelling of 20271384 in words is "twenty million, two hundred seventy-one thousand, three hundred eighty-four".