20533101 has 16 divisors (see below), whose sum is σ = 28226880. Its totient is φ = 13270400.

The previous prime is 20533063. The next prime is 20533109. The reversal of 20533101 is 10133502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20533101 - 2²³ = 12144493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13426 + ... + 14876.

It is an arithmetic number, because the mean of its divisors is an integer number (1764180).

Almost surely, 2^20533101 is an apocalyptic number.

It is an amenable number.

20533101 is a deficient number, since it is larger than the sum of its proper divisors (7693779).

20533101 is a wasteful number, since it uses less digits than its factorization.

20533101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 20533101 is about 4531.3464886279. The cubic root of 20533101 is about 273.8324094586.

Adding to 20533101 its reverse (10133502), we get a palindrome (30666603).

The spelling of 20533101 in words is "twenty million, five hundred thirty-three thousand, one hundred one".