21514516 has 12 divisors (see below), whose sum is σ = 37685088. Its totient is φ = 10747352.

The previous prime is 21514483. The next prime is 21514531. The reversal of 21514516 is 61541512.

It is a happy number.

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, 4755 + ... + 8101.

It is an arithmetic number, because the mean of its divisors is an integer number (3140424).

Almost surely, 2^21514516 is an apocalyptic number.

It is an amenable number.

21514516 is a deficient number, since it is larger than the sum of its proper divisors (16170572).

21514516 is a wasteful number, since it uses less digits than its factorization.

21514516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4958 (or 4956 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 21514516 is about 4638.3742841647. The cubic root of 21514516 is about 278.1274539362.

The spelling of 21514516 in words is "twenty-one million, five hundred fourteen thousand, five hundred sixteen".