20293156 has 24 divisors (see below), whose sum is σ = 39566520. Its totient is φ = 9042432.

The previous prime is 20293151. The next prime is 20293171. The reversal of 20293156 is 65139202.

It can be written as a sum of positive squares in 4 ways, for example, as 6350400 + 13942756 = 2520^2 + 3734^2 .

It is not an unprimeable number, because it can be changed into a prime (20293151) by changing a digit.

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, 5221 + ... + 8236.

It is an arithmetic number, because the mean of its divisors is an integer number (1648605).

Almost surely, 2^20293156 is an apocalyptic number.

20293156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20293156 is a deficient number, since it is larger than the sum of its proper divisors (19273364).

20293156 is a wasteful number, since it uses less digits than its factorization.

20293156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13503 (or 13501 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 20293156 is about 4504.7925590420. The cubic root of 20293156 is about 272.7615803171.

It can be divided in two parts, 20293 and 156, that added together give a square (20449 = 143²).

The spelling of 20293156 in words is "twenty million, two hundred ninety-three thousand, one hundred fifty-six".