20135406 has 8 divisors (see below), whose sum is σ = 40270824. Its totient is φ = 6711800.

The previous prime is 20135377. The next prime is 20135431. The reversal of 20135406 is 60453102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

20135406 is an admirable number.

It is a plaindrome in base 16.

It is a congruent number.

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, 1677945 + ... + 1677956.

It is an arithmetic number, because the mean of its divisors is an integer number (5033853).

Almost surely, 2^20135406 is an apocalyptic number.

20135406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20135406 is a wasteful number, since it uses less digits than its factorization.

20135406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355906.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20135406 is about 4487.2492687614. The cubic root of 20135406 is about 272.0529651038.

Adding to 20135406 its reverse (60453102), we get a palindrome (80588508).

The spelling of 20135406 in words is "twenty million, one hundred thirty-five thousand, four hundred six".