21966058 has 8 divisors (see below), whose sum is σ = 34381728. Its totient is φ = 10505484.

The previous prime is 21966053. The next prime is 21966067. The reversal of 21966058 is 85066912.

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

It is not an unprimeable number, because it can be changed into a prime (21966053) 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, 238716 + ... + 238807.

It is an arithmetic number, because the mean of its divisors is an integer number (4297716).

Almost surely, 2^21966058 is an apocalyptic number.

21966058 is a deficient number, since it is larger than the sum of its proper divisors (12415670).

21966058 is a wasteful number, since it uses less digits than its factorization.

21966058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477548.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 21966058 is about 4686.7961338211. The cubic root of 21966058 is about 280.0597576538.

The spelling of 21966058 in words is "twenty-one million, nine hundred sixty-six thousand, fifty-eight".