21232774774 has 8 divisors (see below), whose sum is σ = 31850585928. Its totient is φ = 10615912800.

The previous prime is 21232774757. The next prime is 21232774777. The reversal of 21232774774 is 47747723212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232774777) 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 3 ways as a sum of consecutive naturals, for example, 178452 + ... + 272599.

It is an arithmetic number, because the mean of its divisors is an integer number (3981323241).

Almost surely, 2^21232774774 is an apocalyptic number.

21232774774 is a deficient number, since it is larger than the sum of its proper divisors (10617811154).

21232774774 is a wasteful number, since it uses less digits than its factorization.

21232774774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474590.

The product of its digits is 921984, while the sum is 46.

The spelling of 21232774774 in words is "twenty-one billion, two hundred thirty-two million, seven hundred seventy-four thousand, seven hundred seventy-four".