20135408 has 20 divisors (see below), whose sum is σ = 39086040. Its totient is φ = 10048704.

The previous prime is 20135377. The next prime is 20135431. The reversal of 20135408 is 80453102.

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, 11963 + ... + 13541.

It is an arithmetic number, because the mean of its divisors is an integer number (1954302).

Almost surely, 2^20135408 is an apocalyptic number.

It is an amenable number.

20135408 is a deficient number, since it is larger than the sum of its proper divisors (18950632).

20135408 is a wasteful number, since it uses less digits than its factorization.

20135408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20135408 is about 4487.2494916151. The cubic root of 20135408 is about 272.0529741113.

The spelling of 20135408 in words is "twenty million, one hundred thirty-five thousand, four hundred eight".