21233281878770 has 32 divisors (see below), whose sum is σ = 42272330003568. Its totient is φ = 7628089621248.

The previous prime is 21233281878763. The next prime is 21233281878773. The reversal of 21233281878770 is 7787818233212.

It can be written as a sum of positive squares in 8 ways, for example, as 15698418667129 + 5534863211641 = 3962123^2 + 2352629^2 .

It is not an unprimeable number, because it can be changed into a prime (21233281878773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2207197049 + ... + 2207206668.

Almost surely, 2^{21233281878770} is an apocalyptic number.

21233281878770 is a deficient number, since it is larger than the sum of its proper divisors (21039048124798).

21233281878770 is a wasteful number, since it uses less digits than its factorization.

21233281878770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414403774.

The product of its (nonzero) digits is 12644352, while the sum is 59.

The spelling of 21233281878770 in words is "twenty-one trillion, two hundred thirty-three billion, two hundred eighty-one million, eight hundred seventy-eight thousand, seven hundred seventy".