20634394 has 8 divisors (see below), whose sum is σ = 33765408. Its totient is φ = 9379260.

The previous prime is 20634389. The next prime is 20634403. The reversal of 20634394 is 49343602.

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

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, 468942 + ... + 468985.

It is an arithmetic number, because the mean of its divisors is an integer number (4220676).

Almost surely, 2^20634394 is an apocalyptic number.

20634394 is a deficient number, since it is larger than the sum of its proper divisors (13131014).

20634394 is a wasteful number, since it uses less digits than its factorization.

20634394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937940.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 20634394 is about 4542.5096587679. The cubic root of 20634394 is about 274.2819570780.

Adding to 20634394 its reverse (49343602), we get a palindrome (69977996).

The spelling of 20634394 in words is "twenty million, six hundred thirty-four thousand, three hundred ninety-four".