21248823464740 has 24 divisors (see below), whose sum is σ = 45064336500792. Its totient is φ = 8415375628800.

The previous prime is 21248823464719. The next prime is 21248823464767. The reversal of 21248823464740 is 4746432884212.

It can be written as a sum of positive squares in 4 ways, for example, as 6728638857444 + 14520184607296 = 2593962^2 + 3810536^2 .

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, 5259607749 + ... + 5259611788.

It is an arithmetic number, because the mean of its divisors is an integer number (1877680687533).

Almost surely, 2^{21248823464740} is an apocalyptic number.

21248823464740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21248823464740 is an abundant number, since it is smaller than the sum of its proper divisors (23815513036052).

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

21248823464740 is a wasteful number, since it uses less digits than its factorization.

21248823464740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10519219647 (or 10519219645 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 55.

The spelling of 21248823464740 in words is "twenty-one trillion, two hundred forty-eight billion, eight hundred twenty-three million, four hundred sixty-four thousand, seven hundred forty".