21364070 has 64 divisors (see below), whose sum is σ = 50150016. Its totient is φ = 6359040.

The previous prime is 21364061. The next prime is 21364073. The reversal of 21364070 is 7046312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14780 + ... + 16160.

It is an arithmetic number, because the mean of its divisors is an integer number (783594).

Almost surely, 2^21364070 is an apocalyptic number.

21364070 is an abundant number, since it is smaller than the sum of its proper divisors (28785946).

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

21364070 is a wasteful number, since it uses less digits than its factorization.

21364070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21364070 is about 4622.1282976568. The cubic root of 21364070 is about 277.4776434117.

The spelling of 21364070 in words is "twenty-one million, three hundred sixty-four thousand, seventy".