21454500411140 has 12 divisors (see below), whose sum is σ = 45054450863436. Its totient is φ = 8581800164448.

The previous prime is 21454500411139. The next prime is 21454500411187. The reversal of 21454500411140 is 4111400545412.

It can be written as a sum of positive squares in 2 ways, for example, as 5017492480576 + 16437007930564 = 2239976^2 + 4054258^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21454500411097 and 21454500411106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536362510259 + ... + 536362510298.

It is an arithmetic number, because the mean of its divisors is an integer number (3754537571953).

Almost surely, 2^{21454500411140} is an apocalyptic number.

21454500411140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21454500411140 is an abundant number, since it is smaller than the sum of its proper divisors (23599950452296).

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

21454500411140 is a wasteful number, since it uses less digits than its factorization.

21454500411140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072725020566 (or 1072725020564 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

Adding to 21454500411140 its reverse (4111400545412), we get a palindrome (25565900956552).

The spelling of 21454500411140 in words is "twenty-one trillion, four hundred fifty-four billion, five hundred million, four hundred eleven thousand, one hundred forty".