21534002416 has 20 divisors (see below), whose sum is σ = 41740734424. Its totient is φ = 10762200000.

The previous prime is 21534002389. The next prime is 21534002453. The reversal of 21534002416 is 61420043512.

It is a congruent number.

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, 262935 + ... + 334966.

Almost surely, 2^21534002416 is an apocalyptic number.

It is an amenable number.

21534002416 is a deficient number, since it is larger than the sum of its proper divisors (20206732008).

21534002416 is a wasteful number, since it uses less digits than its factorization.

21534002416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600160 (or 600154 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21534002416 its reverse (61420043512), we get a palindrome (82954045928).

The spelling of 21534002416 in words is "twenty-one billion, five hundred thirty-four million, two thousand, four hundred sixteen".