20427144 has 16 divisors (see below), whose sum is σ = 51067920. Its totient is φ = 6809040.

The previous prime is 20427139. The next prime is 20427179. The reversal of 20427144 is 44172402.

It is a hoax number, since the sum of its digits (24) 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 (24), and also a Moran number because the ratio is a prime number: 851131 = 20427144 / (2 + 0 + 4 + 2 + 7 + 1 + 4 + 4).

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, 425542 + ... + 425589.

It is an arithmetic number, because the mean of its divisors is an integer number (3191745).

Almost surely, 2^20427144 is an apocalyptic number.

20427144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20427144 is an abundant number, since it is smaller than the sum of its proper divisors (30640776).

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

20427144 is a wasteful number, since it uses less digits than its factorization.

20427144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851140 (or 851136 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 20427144 is about 4519.6398086573. The cubic root of 20427144 is about 273.3605776267.

Adding to 20427144 its reverse (44172402), we get a palindrome (64599546).

The spelling of 20427144 in words is "twenty million, four hundred twenty-seven thousand, one hundred forty-four".