20101406 has 16 divisors (see below), whose sum is σ = 32550000. Its totient is φ = 9255168.

The previous prime is 20101399. The next prime is 20101421. The reversal of 20101406 is 60410102.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15470 + ... + 16718.

It is an arithmetic number, because the mean of its divisors is an integer number (2034375).

Almost surely, 2^20101406 is an apocalyptic number.

20101406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20101406 is a deficient number, since it is larger than the sum of its proper divisors (12448594).

20101406 is a wasteful number, since it uses less digits than its factorization.

20101406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20101406 is about 4483.4591556074. The cubic root of 20101406 is about 271.8997522010.

Adding to 20101406 its reverse (60410102), we get a palindrome (80511508).

The spelling of 20101406 in words is "twenty million, one hundred one thousand, four hundred six".