20402420310 has 48 divisors (see below), whose sum is σ = 53593184736. Its totient is φ = 5384553984.

The previous prime is 20402420281. The next prime is 20402420323. The reversal of 20402420310 is 1302420402.

It is a super-2 number, since 2×20402420310² (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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1159794 + ... + 1177253.

It is an arithmetic number, because the mean of its divisors is an integer number (1116524682).

Almost surely, 2^20402420310 is an apocalyptic number.

20402420310 is an abundant number, since it is smaller than the sum of its proper divisors (33190764426).

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

20402420310 is a wasteful number, since it uses less digits than its factorization.

20402420310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337157 (or 2337154 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20402420310 its reverse (1302420402), we get a palindrome (21704840712).

The spelling of 20402420310 in words is "twenty billion, four hundred two million, four hundred twenty thousand, three hundred ten".