21446070 has 16 divisors (see below), whose sum is σ = 51470640. Its totient is φ = 5718944.

The previous prime is 21446069. The next prime is 21446071. The reversal of 21446070 is 7064412.

It is an interprime number because it is at equal distance from previous prime (21446069) and next prime (21446071).

It is a self number, because there is not a number n which added to its sum of digits gives 21446070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446071) 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, 357405 + ... + 357464.

It is an arithmetic number, because the mean of its divisors is an integer number (3216915).

Almost surely, 2^21446070 is an apocalyptic number.

21446070 is an abundant number, since it is smaller than the sum of its proper divisors (30024570).

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

21446070 is a wasteful number, since it uses less digits than its factorization.

21446070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714879.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 21446070 is about 4630.9901748978. The cubic root of 21446070 is about 277.8321969233.

The spelling of 21446070 in words is "twenty-one million, four hundred forty-six thousand, seventy".