20002201840 has 20 divisors (see below), whose sum is σ = 46505119464. Its totient is φ = 8000880704.

The previous prime is 20002201837. The next prime is 20002201841. The reversal of 20002201840 is 4810220002.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002201841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125013682 + ... + 125013841.

Almost surely, 2^20002201840 is an apocalyptic number.

20002201840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002201840 is an abundant number, since it is smaller than the sum of its proper divisors (26502917624).

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

20002201840 is a wasteful number, since it uses less digits than its factorization.

20002201840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250027536 (or 250027530 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20002201840 its reverse (4810220002), we get a palindrome (24812421842).

The spelling of 20002201840 in words is "twenty billion, two million, two hundred one thousand, eight hundred forty".