21738060 has 36 divisors (see below), whose sum is σ = 65939328. Its totient is φ = 5796768.

The previous prime is 21738049. The next prime is 21738089. The reversal of 21738060 is 6083712.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60204 + ... + 60563.

It is an arithmetic number, because the mean of its divisors is an integer number (1831648).

Almost surely, 2^21738060 is an apocalyptic number.

21738060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21738060 is an abundant number, since it is smaller than the sum of its proper divisors (44201268).

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

21738060 is a wasteful number, since it uses less digits than its factorization.

21738060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120782 (or 120777 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21738060 is about 4662.4092484466. The cubic root of 21738060 is about 279.0874200946.

The spelling of 21738060 in words is "twenty-one million, seven hundred thirty-eight thousand, sixty".