20350003440 has 80 divisors (see below), whose sum is σ = 67937714208. Its totient is φ = 5009230848.

The previous prime is 20350003439. The next prime is 20350003577. The reversal of 20350003440 is 4430005302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3258099 + ... + 3264338.

Almost surely, 2^20350003440 is an apocalyptic number.

20350003440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20350003440 is an abundant number, since it is smaller than the sum of its proper divisors (47587710768).

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

20350003440 is a wasteful number, since it uses less digits than its factorization.

20350003440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6522466 (or 6522460 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

Adding to 20350003440 its reverse (4430005302), we get a palindrome (24780008742).

The spelling of 20350003440 in words is "twenty billion, three hundred fifty million, three thousand, four hundred forty".