20574135 has 32 divisors (see below), whose sum is σ = 36780480. Its totient is φ = 10911744.

The previous prime is 20574091. The next prime is 20574139. The reversal of 20574135 is 53147502.

It is a happy number.

It is not a de Polignac number, because 20574135 - 2⁷ = 20574007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20574099 and 20574108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20574139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34399 + ... + 34991.

It is an arithmetic number, because the mean of its divisors is an integer number (1149390).

Almost surely, 2^20574135 is an apocalyptic number.

20574135 is a deficient number, since it is larger than the sum of its proper divisors (16206345).

20574135 is a wasteful number, since it uses less digits than its factorization.

20574135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 20574135 is about 4535.8720220041. The cubic root of 20574135 is about 274.0146998702.

The spelling of 20574135 in words is "twenty million, five hundred seventy-four thousand, one hundred thirty-five".