20434633 has 4 divisors (see below), whose sum is σ = 21510160. Its totient is φ = 19359108.

The previous prime is 20434607. The next prime is 20434643. The reversal of 20434633 is 33643402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20434633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20434598 and 20434607.

It is not an unprimeable number, because it can be changed into a prime (20434643) 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, 537735 + ... + 537772.

It is an arithmetic number, because the mean of its divisors is an integer number (5377540).

Almost surely, 2^20434633 is an apocalyptic number.

It is an amenable number.

20434633 is a deficient number, since it is larger than the sum of its proper divisors (1075527).

20434633 is a wasteful number, since it uses less digits than its factorization.

20434633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075526.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 20434633 is about 4520.4682279605. The cubic root of 20434633 is about 273.3939800322.

The spelling of 20434633 in words is "twenty million, four hundred thirty-four thousand, six hundred thirty-three".