21069734 has 8 divisors (see below), whose sum is σ = 36119568. Its totient is φ = 9029880.

The previous prime is 21069733. The next prime is 21069751. The reversal of 21069734 is 43796012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21069734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21069733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752477 + ... + 752504.

It is an arithmetic number, because the mean of its divisors is an integer number (4514946).

Almost surely, 2^21069734 is an apocalyptic number.

21069734 is a deficient number, since it is larger than the sum of its proper divisors (15049834).

21069734 is a wasteful number, since it uses less digits than its factorization.

21069734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504990.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 21069734 is about 4590.1779921916. The cubic root of 21069734 is about 276.1974624877.

The spelling of 21069734 in words is "twenty-one million, sixty-nine thousand, seven hundred thirty-four".