21160143154 has 8 divisors (see below), whose sum is σ = 31741016220. Its totient is φ = 10579804416.

The previous prime is 21160143143. The next prime is 21160143187. The reversal of 21160143154 is 45134106112.

It can be written as a sum of positive squares in 2 ways, for example, as 19721989225 + 1438153929 = 140435^2 + 37923^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12699 + ... + 206110.

Almost surely, 2^21160143154 is an apocalyptic number.

21160143154 is a deficient number, since it is larger than the sum of its proper divisors (10580873066).

21160143154 is a wasteful number, since it uses less digits than its factorization.

21160143154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267164.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 21160143154 its reverse (45134106112), we get a palindrome (66294249266).

The spelling of 21160143154 in words is "twenty-one billion, one hundred sixty million, one hundred forty-three thousand, one hundred fifty-four".