20519135 has 24 divisors (see below), whose sum is σ = 30480480. Its totient is φ = 12984192.

The previous prime is 20519129. The next prime is 20519159. The reversal of 20519135 is 53191502.

It is not a de Polignac number, because 20519135 - 2¹⁰ = 20518111 is a prime.

It is a super-2 number, since 2×20519135² = 842069802296450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4181 + ... + 7649.

It is an arithmetic number, because the mean of its divisors is an integer number (1270020).

Almost surely, 2^20519135 is an apocalyptic number.

20519135 is a deficient number, since it is larger than the sum of its proper divisors (9961345).

20519135 is a wasteful number, since it uses less digits than its factorization.

20519135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507 (or 3494 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 20519135 is about 4529.8051834488. The cubic root of 20519135 is about 273.7703111776.

The spelling of 20519135 in words is "twenty million, five hundred nineteen thousand, one hundred thirty-five".