20210030440 has 64 divisors (see below), whose sum is σ = 48165399360. Its totient is φ = 7605642240.

The previous prime is 20210030419. The next prime is 20210030453. The reversal of 20210030440 is 4403001202.

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, 3072355 + ... + 3078925.

It is an arithmetic number, because the mean of its divisors is an integer number (752584365).

Almost surely, 2^20210030440 is an apocalyptic number.

20210030440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210030440 is an abundant number, since it is smaller than the sum of its proper divisors (27955368920).

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

20210030440 is a wasteful number, since it uses less digits than its factorization.

20210030440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11122 (or 11118 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20210030440 its reverse (4403001202), we get a palindrome (24613031642).

The spelling of 20210030440 in words is "twenty billion, two hundred ten million, thirty thousand, four hundred forty".