21514960 has 20 divisors (see below), whose sum is σ = 50022468. Its totient is φ = 8605952.

The previous prime is 21514957. The next prime is 21514963. The reversal of 21514960 is 6941512.

It is an interprime number because it is at equal distance from previous prime (21514957) and next prime (21514963).

It can be written as a sum of positive squares in 2 ways, for example, as 6677056 + 14837904 = 2584^2 + 3852^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514963) 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, 134389 + ... + 134548.

Almost surely, 2^21514960 is an apocalyptic number.

21514960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21514960 is an abundant number, since it is smaller than the sum of its proper divisors (28507508).

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

21514960 is a wasteful number, since it uses less digits than its factorization.

21514960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268950 (or 268944 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 21514960 is about 4638.4221455146. The cubic root of 21514960 is about 278.1293671830.

The spelling of 21514960 in words is "twenty-one million, five hundred fourteen thousand, nine hundred sixty".