20386144 has 12 divisors (see below), whose sum is σ = 40135284. Its totient is φ = 10193056.

The previous prime is 20386133. The next prime is 20386153. The reversal of 20386144 is 44168302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318502 + ... + 318565.

It is an arithmetic number, because the mean of its divisors is an integer number (3344607).

Almost surely, 2^20386144 is an apocalyptic number.

It is an amenable number.

20386144 is a deficient number, since it is larger than the sum of its proper divisors (19749140).

20386144 is an equidigital number, since it uses as much as digits as its factorization.

20386144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637077 (or 637069 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20386144 is about 4515.1017707246. The cubic root of 20386144 is about 273.1775647598.

The spelling of 20386144 in words is "twenty million, three hundred eighty-six thousand, one hundred forty-four".