21154534113416 has 32 divisors (see below), whose sum is σ = 43880083577280. Its totient is φ = 9480264964800.

The previous prime is 21154534113403. The next prime is 21154534113431. The reversal of 21154534113416 is 61431143545112.

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, 1692898211 + ... + 1692910706.

It is an arithmetic number, because the mean of its divisors is an integer number (1371252611790).

Almost surely, 2^{21154534113416} is an apocalyptic number.

It is an amenable number.

21154534113416 is an abundant number, since it is smaller than the sum of its proper divisors (22725549463864).

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

21154534113416 is a wasteful number, since it uses less digits than its factorization.

21154534113416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385809005 (or 3385809001 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

Adding to 21154534113416 its reverse (61431143545112), we get a palindrome (82585677658528).

The spelling of 21154534113416 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred thirty-four million, one hundred thirteen thousand, four hundred sixteen".