21294505420147 has 8 divisors (see below), whose sum is σ = 22596032555712. Its totient is φ = 19998412636800.

The previous prime is 21294505420073. The next prime is 21294505420157. The reversal of 21294505420147 is 74102450549212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21294505420147 is a prime.

It is a super-2 number, since 2×21294505420147² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21294505420097 and 21294505420106.

It is not an unprimeable number, because it can be changed into a prime (21294505420157) 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, 1358579979 + ... + 1358595652.

It is an arithmetic number, because the mean of its divisors is an integer number (2824504069464).

Almost surely, 2^{21294505420147} is an apocalyptic number.

21294505420147 is a deficient number, since it is larger than the sum of its proper divisors (1301527135565).

21294505420147 is a wasteful number, since it uses less digits than its factorization.

21294505420147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717176109.

The product of its (nonzero) digits is 806400, while the sum is 46.

Adding to 21294505420147 its reverse (74102450549212), we get a palindrome (95396955969359).

The spelling of 21294505420147 in words is "twenty-one trillion, two hundred ninety-four billion, five hundred five million, four hundred twenty thousand, one hundred forty-seven".