20952133 has 4 divisors (see below), whose sum is σ = 20965408. Its totient is φ = 20938860.

The previous prime is 20952091. The next prime is 20952161. The reversal of 20952133 is 33125902.

It is a happy number.

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 not a de Polignac number, because 20952133 - 2¹⁷ = 20821061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20952098 and 20952107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20952163) 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, 3891 + ... + 7552.

It is an arithmetic number, because the mean of its divisors is an integer number (5241352).

Almost surely, 2^20952133 is an apocalyptic number.

It is an amenable number.

20952133 is a deficient number, since it is larger than the sum of its proper divisors (13275).

20952133 is a wasteful number, since it uses less digits than its factorization.

20952133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13274.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 20952133 is about 4577.3499975422. The cubic root of 20952133 is about 275.6826368600.

The spelling of 20952133 in words is "twenty million, nine hundred fifty-two thousand, one hundred thirty-three".