21323052354 has 16 divisors (see below), whose sum is σ = 43085756448. Its totient is φ = 7034408832.

The previous prime is 21323052337. The next prime is 21323052367. The reversal of 21323052354 is 45325032312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18318192 + ... + 18319355.

It is an arithmetic number, because the mean of its divisors is an integer number (2692859778).

Almost surely, 2^21323052354 is an apocalyptic number.

21323052354 is an abundant number, since it is smaller than the sum of its proper divisors (21762704094).

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

21323052354 is a wasteful number, since it uses less digits than its factorization.

21323052354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36637649.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 21323052354 its reverse (45325032312), we get a palindrome (66648084666).

The spelling of 21323052354 in words is "twenty-one billion, three hundred twenty-three million, fifty-two thousand, three hundred fifty-four".