21232230078 has 32 divisors (see below), whose sum is σ = 42815840256. Its totient is φ = 7018891488.

The previous prime is 21232230077. The next prime is 21232230127. The reversal of 21232230078 is 87003223212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232230077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2940000 + ... + 2947212.

It is an arithmetic number, because the mean of its divisors is an integer number (1337995008).

Almost surely, 2^21232230078 is an apocalyptic number.

21232230078 is an abundant number, since it is smaller than the sum of its proper divisors (21583610178).

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

21232230078 is a wasteful number, since it uses less digits than its factorization.

21232230078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11208.

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 21232230078 in words is "twenty-one billion, two hundred thirty-two million, two hundred thirty thousand, seventy-eight".