20438303480 has 64 divisors (see below), whose sum is σ = 53275631040. Its totient is φ = 6911419392.

The previous prime is 20438303471. The next prime is 20438303507. The reversal of 20438303480 is 8430383402.

It is a super-2 number, since 2×20438303480² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 20438303480.

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 15 ways as a sum of consecutive naturals, for example, 479519 + ... + 520398.

It is an arithmetic number, because the mean of its divisors is an integer number (832431735).

Almost surely, 2^20438303480 is an apocalyptic number.

20438303480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20438303480 is an abundant number, since it is smaller than the sum of its proper divisors (32837327560).

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

20438303480 is a wasteful number, since it uses less digits than its factorization.

20438303480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000008 (or 1000004 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 20438303480 its reverse (8430383402), we get a palindrome (28868686882).

The spelling of 20438303480 in words is "twenty billion, four hundred thirty-eight million, three hundred three thousand, four hundred eighty".