20001396 has 12 divisors (see below), whose sum is σ = 46669952. Its totient is φ = 6667128.

The previous prime is 20001389. The next prime is 20001439. The reversal of 20001396 is 69310002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833380 + ... + 833403.

Almost surely, 2^20001396 is an apocalyptic number.

It is an amenable number.

20001396 is an abundant number, since it is smaller than the sum of its proper divisors (26668556).

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

20001396 is a wasteful number, since it uses less digits than its factorization.

20001396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666790 (or 1666788 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 20001396 is about 4472.2920298210. The cubic root of 20001396 is about 271.4480770575.

Adding to 20001396 its reverse (69310002), we get a palindrome (89311398).

The spelling of 20001396 in words is "twenty million, one thousand, three hundred ninety-six".