21263555151140 has 12 divisors (see below), whose sum is σ = 44653465817436. Its totient is φ = 8505422060448.

The previous prime is 21263555151101. The next prime is 21263555151151. The reversal of 21263555151140 is 4115155536212.

It can be written as a sum of positive squares in 2 ways, for example, as 16530989852224 + 4732565298916 = 4065832^2 + 2175446^2 .

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, 531588878759 + ... + 531588878798.

It is an arithmetic number, because the mean of its divisors is an integer number (3721122151453).

Almost surely, 2^{21263555151140} is an apocalyptic number.

21263555151140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21263555151140 is an abundant number, since it is smaller than the sum of its proper divisors (23389910666296).

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

21263555151140 is a wasteful number, since it uses less digits than its factorization.

21263555151140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063177757566 (or 1063177757564 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 21263555151140 in words is "twenty-one trillion, two hundred sixty-three billion, five hundred fifty-five million, one hundred fifty-one thousand, one hundred forty".