21301694 has 8 divisors (see below), whose sum is σ = 32037120. Its totient is φ = 10622656.

The previous prime is 21301691. The next prime is 21301711. The reversal of 21301694 is 49610312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301691) 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, 13139 + ... + 14670.

It is an arithmetic number, because the mean of its divisors is an integer number (4004640).

Almost surely, 2^21301694 is an apocalyptic number.

21301694 is a deficient number, since it is larger than the sum of its proper divisors (10735426).

21301694 is a wasteful number, since it uses less digits than its factorization.

21301694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28194.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 21301694 is about 4615.3758243506. The cubic root of 21301694 is about 277.2073325994.

The spelling of 21301694 in words is "twenty-one million, three hundred one thousand, six hundred ninety-four".