20206536 has 32 divisors (see below), whose sum is σ = 57733440. Its totient is φ = 5773248.

The previous prime is 20206493. The next prime is 20206577. The reversal of 20206536 is 63560202.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59971 + ... + 60306.

It is an arithmetic number, because the mean of its divisors is an integer number (1804170).

Almost surely, 2^20206536 is an apocalyptic number.

It is an amenable number.

20206536 is an abundant number, since it is smaller than the sum of its proper divisors (37526904).

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

20206536 is a wasteful number, since it uses less digits than its factorization.

20206536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120293 (or 120289 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20206536 is about 4495.1680724974. The cubic root of 20206536 is about 272.3729385465.

Adding to 20206536 its reverse (63560202), we get a palindrome (83766738).

The spelling of 20206536 in words is "twenty million, two hundred six thousand, five hundred thirty-six".