21346112156459 has 4 divisors (see below), whose sum is σ = 21473933187504. Its totient is φ = 21218291125416.

The previous prime is 21346112156443. The next prime is 21346112156483. The reversal of 21346112156459 is 95465121164312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21346112156459 - 2⁴ = 21346112156443 is a prime.

It is a super-2 number, since 2×21346112156459² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21346112156419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63910515272 + ... + 63910515605.

It is an arithmetic number, because the mean of its divisors is an integer number (5368483296876).

Almost surely, 2^{21346112156459} is an apocalyptic number.

21346112156459 is a deficient number, since it is larger than the sum of its proper divisors (127821031045).

21346112156459 is a wasteful number, since it uses less digits than its factorization.

21346112156459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127821031044.

The product of its digits is 1555200, while the sum is 50.

The spelling of 21346112156459 in words is "twenty-one trillion, three hundred forty-six billion, one hundred twelve million, one hundred fifty-six thousand, four hundred fifty-nine".