20135554 has 16 divisors (see below), whose sum is σ = 32820480. Its totient is φ = 9229680.

The previous prime is 20135539. The next prime is 20135587. The reversal of 20135554 is 45553102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7369 + ... + 9724.

It is an arithmetic number, because the mean of its divisors is an integer number (2051280).

Almost surely, 2^20135554 is an apocalyptic number.

20135554 is a deficient number, since it is larger than the sum of its proper divisors (12684926).

20135554 is a wasteful number, since it uses less digits than its factorization.

20135554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17145.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 20135554 is about 4487.2657599032. The cubic root of 20135554 is about 272.0536316534.

Adding to 20135554 its reverse (45553102), we get a palindrome (65688656).

The spelling of 20135554 in words is "twenty million, one hundred thirty-five thousand, five hundred fifty-four".