21014460 has 36 divisors (see below), whose sum is σ = 63744408. Its totient is φ = 5603808.

The previous prime is 21014459. The next prime is 21014471. The reversal of 21014460 is 6441012.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 58194 + ... + 58553.

It is an arithmetic number, because the mean of its divisors is an integer number (1770678).

Almost surely, 2^21014460 is an apocalyptic number.

21014460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21014460 is an abundant number, since it is smaller than the sum of its proper divisors (42729948).

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

21014460 is a wasteful number, since it uses less digits than its factorization.

21014460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116762 (or 116757 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 21014460 is about 4584.1531388033. The cubic root of 21014460 is about 275.9557269880.

Adding to 21014460 its reverse (6441012), we get a palindrome (27455472).

It can be divided in two parts, 2101 and 4460, that added together give a 8-th power (6561 = 3⁸).

The spelling of 21014460 in words is "twenty-one million, fourteen thousand, four hundred sixty".