20970633 has 8 divisors (see below), whose sum is σ = 27983968. Its totient is φ = 13968864.

The previous prime is 20970617. The next prime is 20970643. The reversal of 20970633 is 33607902.

It is a happy number.

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

It is not a de Polignac number, because 20970633 - 2⁴ = 20970617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20970633.

It is not an unprimeable number, because it can be changed into a prime (20970643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3141 + ... + 7197.

It is an arithmetic number, because the mean of its divisors is an integer number (3497996).

Almost surely, 2^20970633 is an apocalyptic number.

It is an amenable number.

20970633 is a deficient number, since it is larger than the sum of its proper divisors (7013335).

20970633 is a wasteful number, since it uses less digits than its factorization.

20970633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5783.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 20970633 is about 4579.3703715686. The cubic root of 20970633 is about 275.7637523632.

The spelling of 20970633 in words is "twenty million, nine hundred seventy thousand, six hundred thirty-three".