21323542323345 has 16 divisors (see below), whose sum is σ = 35039766845760. Its totient is φ = 11065189529664.

The previous prime is 21323542323337. The next prime is 21323542323359. The reversal of 21323542323345 is 54332324532312.

It is not a de Polignac number, because 21323542323345 - 2³ = 21323542323337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21323542323297 and 21323542323306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19210397935 + ... + 19210399044.

It is an arithmetic number, because the mean of its divisors is an integer number (2189985427860).

Almost surely, 2^{21323542323345} is an apocalyptic number.

It is an amenable number.

21323542323345 is a deficient number, since it is larger than the sum of its proper divisors (13716224522415).

21323542323345 is a wasteful number, since it uses less digits than its factorization.

21323542323345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38420797024.

The product of its digits is 1555200, while the sum is 42.

Adding to 21323542323345 its reverse (54332324532312), we get a palindrome (75655866855657).

The spelling of 21323542323345 in words is "twenty-one trillion, three hundred twenty-three billion, five hundred forty-two million, three hundred twenty-three thousand, three hundred forty-five".