20945634 has 8 divisors (see below), whose sum is σ = 41891280. Its totient is φ = 6981876.

The previous prime is 20945623. The next prime is 20945651. The reversal of 20945634 is 43654902.

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

20945634 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20945595 and 20945604.

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, 1745464 + ... + 1745475.

It is an arithmetic number, because the mean of its divisors is an integer number (5236410).

Almost surely, 2^20945634 is an apocalyptic number.

20945634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20945634 is a wasteful number, since it uses less digits than its factorization.

20945634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490944.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 20945634 is about 4576.6400339113. The cubic root of 20945634 is about 275.6541298700.

The spelling of 20945634 in words is "twenty million, nine hundred forty-five thousand, six hundred thirty-four".