21970334 has 8 divisors (see below), whose sum is σ = 33722040. Its totient is φ = 10729656.

The previous prime is 21970303. The next prime is 21970339. The reversal of 21970334 is 43307912.

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

It is a junction number, because it is equal to n+sod(n) for n = 21970297 and 21970306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21970339) 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, 127649 + ... + 127820.

It is an arithmetic number, because the mean of its divisors is an integer number (4215255).

Almost surely, 2^21970334 is an apocalyptic number.

21970334 is a deficient number, since it is larger than the sum of its proper divisors (11751706).

21970334 is a wasteful number, since it uses less digits than its factorization.

21970334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255514.

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

The square root of 21970334 is about 4687.2522867881. The cubic root of 21970334 is about 280.0779289892.

The spelling of 21970334 in words is "twenty-one million, nine hundred seventy thousand, three hundred thirty-four".