21541543414000 has 40 divisors (see below), whose sum is σ = 52087451979888. Its totient is φ = 8616617364800.

The previous prime is 21541543413989. The next prime is 21541543414003. The reversal of 21541543414000 is 41434514512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541543414003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5385383854 + ... + 5385387853.

Almost surely, 2^{21541543414000} is an apocalyptic number.

21541543414000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21541543414000 is an abundant number, since it is smaller than the sum of its proper divisors (30545908565888).

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

21541543414000 is a wasteful number, since it uses less digits than its factorization.

21541543414000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770771730 (or 10770771714 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 21541543414000 its reverse (41434514512), we get a palindrome (21582977928512).

The spelling of 21541543414000 in words is "twenty-one trillion, five hundred forty-one billion, five hundred forty-three million, four hundred fourteen thousand".