21454051210 has 32 divisors (see below), whose sum is σ = 40661092800. Its totient is φ = 8127694080.

The previous prime is 21454051193. The next prime is 21454051243. The reversal of 21454051210 is 1215045412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772770 + ... + 800050.

It is an arithmetic number, because the mean of its divisors is an integer number (1270659150).

Almost surely, 2^21454051210 is an apocalyptic number.

21454051210 is a deficient number, since it is larger than the sum of its proper divisors (19207041590).

21454051210 is a wasteful number, since it uses less digits than its factorization.

21454051210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31446.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 21454051210 its reverse (1215045412), we get a palindrome (22669096622).

The spelling of 21454051210 in words is "twenty-one billion, four hundred fifty-four million, fifty-one thousand, two hundred ten".