21364763520144 has 40 divisors (see below), whose sum is σ = 60209788103712. Its totient is φ = 6474170763520.

The previous prime is 21364763520041. The next prime is 21364763520169. The reversal of 21364763520144 is 44102536746312.

It is a super-3 number, since 3×21364763520144³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 21364763520093 and 21364763520102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20231783109 + ... + 20231784164.

Almost surely, 2^{21364763520144} is an apocalyptic number.

21364763520144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21364763520144 is an abundant number, since it is smaller than the sum of its proper divisors (38845024583568).

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

21364763520144 is a wasteful number, since it uses less digits than its factorization.

21364763520144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40463567295 (or 40463567289 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 21364763520144 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred sixty-three million, five hundred twenty thousand, one hundred forty-four".