20310426 has 72 divisors (see below), whose sum is σ = 48310080. Its totient is φ = 6393816.

The previous prime is 20310401. The next prime is 20310463. The reversal of 20310426 is 62401302.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20310399 and 20310408.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 257055 + ... + 257133.

Almost surely, 2^20310426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20310426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24155040).

20310426 is an abundant number, since it is smaller than the sum of its proper divisors (27999654).

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

20310426 is an equidigital number, since it uses as much as digits as its factorization.

20310426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20310426 is about 4506.7089988150. The cubic root of 20310426 is about 272.8389340950.

Adding to 20310426 its reverse (62401302), we get a palindrome (82711728).

It can be divided in two parts, 20310 and 426, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20310426 in words is "twenty million, three hundred ten thousand, four hundred twenty-six".