20387214 has 64 divisors (see below), whose sum is σ = 47232000. Its totient is φ = 6595992.

The previous prime is 20387201. The next prime is 20387219. The reversal of 20387214 is 41278302.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20387219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258027 + ... + 258105.

It is an arithmetic number, because the mean of its divisors is an integer number (738000).

Almost surely, 2^20387214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20387214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23616000).

20387214 is an abundant number, since it is smaller than the sum of its proper divisors (26844786).

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

20387214 is an frugal number, since it uses more digits than its factorization.

20387214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 143 counting only the distinct ones).

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

The square root of 20387214 is about 4515.2202604081. The cubic root of 20387214 is about 273.1823440661.

The spelling of 20387214 in words is "twenty million, three hundred eighty-seven thousand, two hundred fourteen".