21790334 has 8 divisors (see below), whose sum is σ = 33739968. Its totient is φ = 10543680.

The previous prime is 21790309. The next prime is 21790369. The reversal of 21790334 is 43309712.

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

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 21790297 and 21790306.

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, 175667 + ... + 175790.

It is an arithmetic number, because the mean of its divisors is an integer number (4217496).

Almost surely, 2^21790334 is an apocalyptic number.

21790334 is a deficient number, since it is larger than the sum of its proper divisors (11949634).

21790334 is a wasteful number, since it uses less digits than its factorization.

21790334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351490.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 21790334 is about 4668.0117823330. The cubic root of 21790334 is about 279.3109502719.

The spelling of 21790334 in words is "twenty-one million, seven hundred ninety thousand, three hundred thirty-four".