20935634 has 8 divisors (see below), whose sum is σ = 31643568. Its totient is φ = 10387780.

The previous prime is 20935613. The next prime is 20935637. The reversal of 20935634 is 43653902.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20935634.

It is not an unprimeable number, because it can be changed into a prime (20935637) 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, 39692 + ... + 40215.

It is an arithmetic number, because the mean of its divisors is an integer number (3955446).

Almost surely, 2^20935634 is an apocalyptic number.

20935634 is a deficient number, since it is larger than the sum of its proper divisors (10707934).

20935634 is a wasteful number, since it uses less digits than its factorization.

20935634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80040.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 20935634 is about 4575.5473989458. The cubic root of 20935634 is about 275.6102546946.

The spelling of 20935634 in words is "twenty million, nine hundred thirty-five thousand, six hundred thirty-four".