21514223516 has 6 divisors (see below), whose sum is σ = 37649891160. Its totient is φ = 10757111756.

The previous prime is 21514223447. The next prime is 21514223557. The reversal of 21514223516 is 61532241512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2689277936 + ... + 2689277943.

It is an arithmetic number, because the mean of its divisors is an integer number (6274981860).

Almost surely, 2^21514223516 is an apocalyptic number.

It is an amenable number.

21514223516 is a deficient number, since it is larger than the sum of its proper divisors (16135667644).

21514223516 is a wasteful number, since it uses less digits than its factorization.

21514223516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378555883 (or 5378555881 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The spelling of 21514223516 in words is "twenty-one billion, five hundred fourteen million, two hundred twenty-three thousand, five hundred sixteen".