21301464 has 32 divisors (see below), whose sum is σ = 54973440. Its totient is φ = 6871200.

The previous prime is 21301463. The next prime is 21301471. The reversal of 21301464 is 46410312.

It is a self number, because there is not a number n which added to its sum of digits gives 21301464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13572 + ... + 15059.

It is an arithmetic number, because the mean of its divisors is an integer number (1717920).

Almost surely, 2^21301464 is an apocalyptic number.

21301464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21301464 is an abundant number, since it is smaller than the sum of its proper divisors (33671976).

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

21301464 is a wasteful number, since it uses less digits than its factorization.

21301464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28671 (or 28667 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21301464 is about 4615.3509075692. The cubic root of 21301464 is about 277.2063349023.

Adding to 21301464 its reverse (46410312), we get a palindrome (67711776).

The spelling of 21301464 in words is "twenty-one million, three hundred one thousand, four hundred sixty-four".