20536860 has 24 divisors (see below), whose sum is σ = 57503376. Its totient is φ = 5476480.

The previous prime is 20536847. The next prime is 20536889. The reversal of 20536860 is 6863502.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171081 + ... + 171200.

It is an arithmetic number, because the mean of its divisors is an integer number (2395974).

Almost surely, 2^20536860 is an apocalyptic number.

20536860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20536860 is an abundant number, since it is smaller than the sum of its proper divisors (36966516).

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

20536860 is a wasteful number, since it uses less digits than its factorization.

20536860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342293 (or 342291 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20536860 is about 4531.7612470209. The cubic root of 20536860 is about 273.8491186285.

The spelling of 20536860 in words is "twenty million, five hundred thirty-six thousand, eight hundred sixty".