21450260351 has 8 divisors (see below), whose sum is σ = 23183678784. Its totient is φ = 19728756000.

The previous prime is 21450260341. The next prime is 21450260383. The reversal of 21450260351 is 15306205412.

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-21450260351 is a prime.

It is a super-2 number, since 2×21450260351² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450260341) 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, 2974775 + ... + 2981976.

It is an arithmetic number, because the mean of its divisors is an integer number (2897959848).

Almost surely, 2^21450260351 is an apocalyptic number.

21450260351 is a deficient number, since it is larger than the sum of its proper divisors (1733418433).

21450260351 is a wasteful number, since it uses less digits than its factorization.

21450260351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5957041.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21450260351 its reverse (15306205412), we get a palindrome (36756465763).

The spelling of 21450260351 in words is "twenty-one billion, four hundred fifty million, two hundred sixty thousand, three hundred fifty-one".