20356356 has 12 divisors (see below), whose sum is σ = 47498192. Its totient is φ = 6785448.

The previous prime is 20356337. The next prime is 20356363. The reversal of 20356356 is 65365302.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 848170 + ... + 848193.

Almost surely, 2^20356356 is an apocalyptic number.

It is an amenable number.

20356356 is an abundant number, since it is smaller than the sum of its proper divisors (27141836).

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

20356356 is a wasteful number, since it uses less digits than its factorization.

20356356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696370 (or 1696368 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 20356356 is about 4511.8018573515. The cubic root of 20356356 is about 273.0444452588.

The spelling of 20356356 in words is "twenty million, three hundred fifty-six thousand, three hundred fifty-six".