20731302 has 56 divisors (see below), whose sum is σ = 47611080. Its totient is φ = 6765120.

The previous prime is 20731301. The next prime is 20731307. The reversal of 20731302 is 20313702.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731301) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 85902 + ... + 86142.

Almost surely, 2^20731302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20731302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23805540).

20731302 is an abundant number, since it is smaller than the sum of its proper divisors (26879778).

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

20731302 is an equidigital number, since it uses as much as digits as its factorization.

20731302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20731302 is about 4553.1639548780. The cubic root of 20731302 is about 274.7106687001.

It can be divided in two parts, 2073 and 1302, that added together give a cube (3375 = 15³).

The spelling of 20731302 in words is "twenty million, seven hundred thirty-one thousand, three hundred two".