20533007 has 4 divisors (see below), whose sum is σ = 22399656. Its totient is φ = 18666360.

The previous prime is 20533001. The next prime is 20533049. The reversal of 20533007 is 70033502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20533007 - 2⁸ = 20532751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20533007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533001) 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, 933308 + ... + 933329.

It is an arithmetic number, because the mean of its divisors is an integer number (5599914).

Almost surely, 2^20533007 is an apocalyptic number.

20533007 is a deficient number, since it is larger than the sum of its proper divisors (1866649).

20533007 is a wasteful number, since it uses less digits than its factorization.

20533007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866648.

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 20533007 is about 4531.3361164231. The cubic root of 20533007 is about 273.8319915920.

Adding to 20533007 its reverse (70033502), we get a palindrome (90566509).

The spelling of 20533007 in words is "twenty million, five hundred thirty-three thousand, seven".