21202141340 has 24 divisors (see below), whose sum is σ = 44527955472. Its totient is φ = 8480197760.

The previous prime is 21202141327. The next prime is 21202141391. The reversal of 21202141340 is 4314120212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286232 + ... + 352608.

It is an arithmetic number, because the mean of its divisors is an integer number (1855331478).

Almost surely, 2^21202141340 is an apocalyptic number.

21202141340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202141340 is an abundant number, since it is smaller than the sum of its proper divisors (23325814132).

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

21202141340 is a wasteful number, since it uses less digits than its factorization.

21202141340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82357 (or 82355 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21202141340 its reverse (4314120212), we get a palindrome (25516261552).

The spelling of 21202141340 in words is "twenty-one billion, two hundred two million, one hundred forty-one thousand, three hundred forty".