21234215773671 has 32 divisors (see below), whose sum is σ = 28904988819456. Its totient is φ = 13862511180000.

The previous prime is 21234215773651. The next prime is 21234215773697. The reversal of 21234215773671 is 17637751243212.

It is not a de Polignac number, because 21234215773671 - 2²² = 21234211579367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234215773601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271127100 + ... + 271205406.

It is an arithmetic number, because the mean of its divisors is an integer number (903280900608).

Almost surely, 2^{21234215773671} is an apocalyptic number.

21234215773671 is a deficient number, since it is larger than the sum of its proper divisors (7670773045785).

21234215773671 is a wasteful number, since it uses less digits than its factorization.

21234215773671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86963.

The product of its digits is 2963520, while the sum is 51.

The spelling of 21234215773671 in words is "twenty-one trillion, two hundred thirty-four billion, two hundred fifteen million, seven hundred seventy-three thousand, six hundred seventy-one".