20130356 has 12 divisors (see below), whose sum is σ = 35354592. Its totient is φ = 10029048.

The previous prime is 20130349. The next prime is 20130371. The reversal of 20130356 is 65303102.

It is a congruent number.

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, 7760 + ... + 10023.

It is an arithmetic number, because the mean of its divisors is an integer number (2946216).

Almost surely, 2^20130356 is an apocalyptic number.

It is an amenable number.

20130356 is a deficient number, since it is larger than the sum of its proper divisors (15224236).

20130356 is a wasteful number, since it uses less digits than its factorization.

20130356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18070 (or 18068 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 20130356 is about 4486.6865279402. The cubic root of 20130356 is about 272.0302193933.

Adding to 20130356 its reverse (65303102), we get a palindrome (85433458).

The spelling of 20130356 in words is "twenty million, one hundred thirty thousand, three hundred fifty-six".