21373070 has 8 divisors (see below), whose sum is σ = 38471544. Its totient is φ = 8549224.

The previous prime is 21373069. The next prime is 21373103. The reversal of 21373070 is 7037312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068644 + ... + 1068663.

It is an arithmetic number, because the mean of its divisors is an integer number (4808943).

Almost surely, 2^21373070 is an apocalyptic number.

21373070 is a deficient number, since it is larger than the sum of its proper divisors (17098474).

21373070 is a wasteful number, since it uses less digits than its factorization.

21373070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137314.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 21373070 is about 4623.1017726198. The cubic root of 21373070 is about 277.5166020963.

The spelling of 21373070 in words is "twenty-one million, three hundred seventy-three thousand, seventy".