21465070 has 16 divisors (see below), whose sum is σ = 42149808. Its totient is φ = 7805440.

The previous prime is 21465061. The next prime is 21465071. The reversal of 21465070 is 7056412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21465071) 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, 97459 + ... + 97678.

It is an arithmetic number, because the mean of its divisors is an integer number (2634363).

Almost surely, 2^21465070 is an apocalyptic number.

21465070 is a deficient number, since it is larger than the sum of its proper divisors (20684738).

21465070 is a wasteful number, since it uses less digits than its factorization.

21465070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195155.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 21465070 is about 4633.0411178836. The cubic root of 21465070 is about 277.9142205543.

The spelling of 21465070 in words is "twenty-one million, four hundred sixty-five thousand, seventy".