21234017770 has 16 divisors (see below), whose sum is σ = 43681408128. Its totient is φ = 7280234640.

The previous prime is 21234017743. The next prime is 21234017873. The reversal of 21234017770 is 7771043212.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 151671486 + ... + 151671625.

It is an arithmetic number, because the mean of its divisors is an integer number (2730088008).

Almost surely, 2^21234017770 is an apocalyptic number.

21234017770 is an abundant number, since it is smaller than the sum of its proper divisors (22447390358).

21234017770 is a wasteful number, since it uses less digits than its factorization.

21234017770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303343125.

The product of its (nonzero) digits is 16464, while the sum is 34.

The spelling of 21234017770 in words is "twenty-one billion, two hundred thirty-four million, seventeen thousand, seven hundred seventy".