21514016 has 24 divisors (see below), whose sum is σ = 44198784. Its totient is φ = 10288960.

The previous prime is 21514013. The next prime is 21514019. The reversal of 21514016 is 61041512.

It is an interprime number because it is at equal distance from previous prime (21514013) and next prime (21514019).

It is not an unprimeable number, because it can be changed into a prime (21514013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13880 + ... + 15351.

It is an arithmetic number, because the mean of its divisors is an integer number (1841616).

Almost surely, 2^21514016 is an apocalyptic number.

It is an amenable number.

21514016 is an abundant number, since it is smaller than the sum of its proper divisors (22684768).

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

21514016 is a wasteful number, since it uses less digits than its factorization.

21514016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29264 (or 29256 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 21514016 is about 4638.3203856569. The cubic root of 21514016 is about 278.1252993474.

Adding to 21514016 its reverse (61041512), we get a palindrome (82555528).

The spelling of 21514016 in words is "twenty-one million, five hundred fourteen thousand, sixteen".