21464370 has 48 divisors (see below), whose sum is σ = 59094360. Its totient is φ = 5386752.

The previous prime is 21464347. The next prime is 21464371. The reversal of 21464370 is 7346412.

21464370 is a `hidden beast` number, since 2 + 14 + 643 + 7 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13995081 + 7469289 = 3741^2 + 2733^2 .

It is not an unprimeable number, because it can be changed into a prime (21464371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5485 + ... + 8544.

Almost surely, 2^21464370 is an apocalyptic number.

21464370 is an abundant number, since it is smaller than the sum of its proper divisors (37629990).

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

21464370 is a wasteful number, since it uses less digits than its factorization.

21464370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14059 (or 14056 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 21464370 is about 4632.9655729349. The cubic root of 21464370 is about 277.9111994901.

The spelling of 21464370 in words is "twenty-one million, four hundred sixty-four thousand, three hundred seventy".