21420411041400 has 96 divisors (see below), whose sum is σ = 75889456275840. Its totient is φ = 4896093951360.

The previous prime is 21420411041383. The next prime is 21420411041437. The reversal of 21420411041400 is 414011402412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2550044734 + ... + 2550053133.

It is an arithmetic number, because the mean of its divisors is an integer number (790515169540).

Almost surely, 2^{21420411041400} is an apocalyptic number.

21420411041400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21420411041400 is an abundant number, since it is smaller than the sum of its proper divisors (54469045234440).

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

21420411041400 is a wasteful number, since it uses less digits than its factorization.

21420411041400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100097893 (or 5100097884 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 21420411041400 its reverse (414011402412), we get a palindrome (21834422443812).

The spelling of 21420411041400 in words is "twenty-one trillion, four hundred twenty billion, four hundred eleven million, forty-one thousand, four hundred".