21340220202040 has 32 divisors (see below), whose sum is σ = 48063947103360. Its totient is φ = 8527474454400.

The previous prime is 21340220201921. The next prime is 21340220202083. The reversal of 21340220202040 is 4020202204312.

It is a super-2 number, since 2×21340220202040² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269135691 + ... + 269214970.

It is an arithmetic number, because the mean of its divisors is an integer number (1501998346980).

Almost surely, 2^{21340220202040} is an apocalyptic number.

21340220202040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21340220202040 is an abundant number, since it is smaller than the sum of its proper divisors (26723726901320).

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

21340220202040 is a wasteful number, since it uses less digits than its factorization.

21340220202040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538351663 (or 538351659 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21340220202040 its reverse (4020202204312), we get a palindrome (25360422406352).

The spelling of 21340220202040 in words is "twenty-one trillion, three hundred forty billion, two hundred twenty million, two hundred two thousand, forty".