21342354363 has 64 divisors (see below), whose sum is σ = 34749411840. Its totient is φ = 12838953600.

The previous prime is 21342354347. The next prime is 21342354379. The reversal of 21342354363 is 36345324312.

21342354363 is a `hidden beast` number, since 2 + 1 + 34 + 23 + 543 + 63 = 666.

It is an interprime number because it is at equal distance from previous prime (21342354347) and next prime (21342354379).

It is not a de Polignac number, because 21342354363 - 2⁴ = 21342354347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21342354323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 37376868 + ... + 37377438.

It is an arithmetic number, because the mean of its divisors is an integer number (542959560).

Almost surely, 2^21342354363 is an apocalyptic number.

21342354363 is a deficient number, since it is larger than the sum of its proper divisors (13407057477).

21342354363 is a wasteful number, since it uses less digits than its factorization.

21342354363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1299 counting only the distinct ones).

The product of its digits is 155520, while the sum is 36.

Adding to 21342354363 its reverse (36345324312), we get a palindrome (57687678675).

The spelling of 21342354363 in words is "twenty-one billion, three hundred forty-two million, three hundred fifty-four thousand, three hundred sixty-three".