20403023310 has 128 divisors (see below), whose sum is σ = 57552629760. Its totient is φ = 5132844288.

The previous prime is 20403023309. The next prime is 20403023321. The reversal of 20403023310 is 1332030402.

20403023310 is a `hidden beast` number, since 20 + 403 + 0 + 233 + 10 = 666.

It is a super-2 number, since 2×20403023310² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 430827 + ... + 475833.

It is an arithmetic number, because the mean of its divisors is an integer number (449629920).

Almost surely, 2^20403023310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20403023310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28776314880).

20403023310 is an abundant number, since it is smaller than the sum of its proper divisors (37149606450).

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

20403023310 is a wasteful number, since it uses less digits than its factorization.

20403023310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45119 (or 45113 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20403023310 its reverse (1332030402), we get a palindrome (21735053712).

The spelling of 20403023310 in words is "twenty billion, four hundred three million, twenty-three thousand, three hundred ten".