20532953 has 4 divisors (see below), whose sum is σ = 23466240. Its totient is φ = 17599668.

The previous prime is 20532949. The next prime is 20532961. The reversal of 20532953 is 35923502.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35923502 = 2 ⋅17961751.

It is a cyclic number.

It is not a de Polignac number, because 20532953 - 2² = 20532949 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20532913) 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, 1466633 + ... + 1466646.

It is an arithmetic number, because the mean of its divisors is an integer number (5866560).

Almost surely, 2^20532953 is an apocalyptic number.

It is an amenable number.

20532953 is a deficient number, since it is larger than the sum of its proper divisors (2933287).

20532953 is an equidigital number, since it uses as much as digits as its factorization.

20532953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2933286.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 20532953 is about 4531.3301579117. The cubic root of 20532953 is about 273.8317515405.

The spelling of 20532953 in words is "twenty million, five hundred thirty-two thousand, nine hundred fifty-three".