20003424640 has 32 divisors (see below), whose sum is σ = 47820688560. Its totient is φ = 8001369600.

The previous prime is 20003424619. The next prime is 20003424673. The reversal of 20003424640 is 4642430002.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15627036 + ... + 15628315.

Almost surely, 2^20003424640 is an apocalyptic number.

20003424640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20003424640 is an abundant number, since it is smaller than the sum of its proper divisors (27817263920).

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

20003424640 is an equidigital number, since it uses as much as digits as its factorization.

20003424640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31255370 (or 31255358 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20003424640 its reverse (4642430002), we get a palindrome (24645854642).

The spelling of 20003424640 in words is "twenty billion, three million, four hundred twenty-four thousand, six hundred forty".