20634413 has 8 divisors (see below), whose sum is σ = 21950208. Its totient is φ = 19329984.

The previous prime is 20634407. The next prime is 20634421. The reversal of 20634413 is 31443602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20634413 - 2⁶ = 20634349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20634403) 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, 1070 + ... + 6512.

It is an arithmetic number, because the mean of its divisors is an integer number (2743776).

Almost surely, 2^20634413 is an apocalyptic number.

It is an amenable number.

20634413 is a deficient number, since it is larger than the sum of its proper divisors (1315795).

20634413 is a wasteful number, since it uses less digits than its factorization.

20634413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20634413 is about 4542.5117501224. The cubic root of 20634413 is about 274.2820412635.

It can be divided in two parts, 2063 and 4413, that multiplied together give a palindrome (9104019).

The spelling of 20634413 in words is "twenty million, six hundred thirty-four thousand, four hundred thirteen".