21434013144 has 48 divisors (see below), whose sum is σ = 58065579000. Its totient is φ = 7142809344.

The previous prime is 21434013131. The next prime is 21434013203. The reversal of 21434013144 is 44131043412.

21434013144 is a `hidden beast` number, since 2 + 1 + 4 + 340 + 1 + 314 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254767 + ... + 328289.

Almost surely, 2^21434013144 is an apocalyptic number.

21434013144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21434013144 is an abundant number, since it is smaller than the sum of its proper divisors (36631565856).

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

21434013144 is a wasteful number, since it uses less digits than its factorization.

21434013144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77584 (or 77577 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21434013144 its reverse (44131043412), we get a palindrome (65565056556).

The spelling of 21434013144 in words is "twenty-one billion, four hundred thirty-four million, thirteen thousand, one hundred forty-four".