20570136 has 32 divisors (see below), whose sum is σ = 54451440. Its totient is φ = 6453248.

The previous prime is 20570117. The next prime is 20570167. The reversal of 20570136 is 63107502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 24801 + ... + 25616.

Almost surely, 2^20570136 is an apocalyptic number.

It is an amenable number.

20570136 is an abundant number, since it is smaller than the sum of its proper divisors (33881304).

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

20570136 is a wasteful number, since it uses less digits than its factorization.

20570136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50443 (or 50439 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 20570136 is about 4535.4311812660. The cubic root of 20570136 is about 273.9969452836.

Adding to 20570136 its reverse (63107502), we get a palindrome (83677638).

It can be divided in two parts, 20570 and 136, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 20570136 in words is "twenty million, five hundred seventy thousand, one hundred thirty-six".