21200203140 has 48 divisors (see below), whose sum is σ = 60741054528. Its totient is φ = 5521912704.

The previous prime is 21200203109. The next prime is 21200203159. The reversal of 21200203140 is 4130200212.

It is a super-2 number, since 2×21200203140² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 4105987 + ... + 4111146.

It is an arithmetic number, because the mean of its divisors is an integer number (1265438636).

Almost surely, 2^21200203140 is an apocalyptic number.

21200203140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200203140 is an abundant number, since it is smaller than the sum of its proper divisors (39540851388).

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

21200203140 is a wasteful number, since it uses less digits than its factorization.

21200203140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8217188 (or 8217186 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21200203140 its reverse (4130200212), we get a palindrome (25330403352).

The spelling of 21200203140 in words is "twenty-one billion, two hundred million, two hundred three thousand, one hundred forty".