21413140220500 has 96 divisors (see below), whose sum is σ = 53524551644928. Its totient is φ = 7331022576000.

The previous prime is 21413140220471. The next prime is 21413140220603. The reversal of 21413140220500 is 502204131412.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2008447 + ... + 6845446.

It is an arithmetic number, because the mean of its divisors is an integer number (557547412968).

Almost surely, 2^{21413140220500} is an apocalyptic number.

21413140220500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21413140220500 is an abundant number, since it is smaller than the sum of its proper divisors (32111411424428).

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

21413140220500 is a wasteful number, since it uses less digits than its factorization.

21413140220500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8854610 (or 8854598 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21413140220500 its reverse (502204131412), we get a palindrome (21915344351912).

The spelling of 21413140220500 in words is "twenty-one trillion, four hundred thirteen billion, one hundred forty million, two hundred twenty thousand, five hundred".