21342551417 has 8 divisors (see below), whose sum is σ = 24652359072. Its totient is φ = 18261006400.

The previous prime is 21342551407. The next prime is 21342551429. The reversal of 21342551417 is 71415524312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21342551417 - 2¹² = 21342547321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21342551407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57065459 + ... + 57065832.

It is an arithmetic number, because the mean of its divisors is an integer number (3081544884).

Almost surely, 2^21342551417 is an apocalyptic number.

It is an amenable number.

21342551417 is a deficient number, since it is larger than the sum of its proper divisors (3309807655).

21342551417 is a wasteful number, since it uses less digits than its factorization.

21342551417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114131319.

The product of its digits is 33600, while the sum is 35.

The spelling of 21342551417 in words is "twenty-one billion, three hundred forty-two million, five hundred fifty-one thousand, four hundred seventeen".