21351114354 has 16 divisors (see below), whose sum is σ = 42727412448. Its totient is φ = 7112840832.

The previous prime is 21351114319. The next prime is 21351114371. The reversal of 21351114354 is 45341115312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038292 + ... + 1058655.

It is an arithmetic number, because the mean of its divisors is an integer number (2670463278).

Almost surely, 2^21351114354 is an apocalyptic number.

21351114354 is an abundant number, since it is smaller than the sum of its proper divisors (21376298094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21351114354 is a wasteful number, since it uses less digits than its factorization.

21351114354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098649.

The product of its digits is 7200, while the sum is 30.

Adding to 21351114354 its reverse (45341115312), we get a palindrome (66692229666).

The spelling of 21351114354 in words is "twenty-one billion, three hundred fifty-one million, one hundred fourteen thousand, three hundred fifty-four".