20542953 has 8 divisors (see below), whose sum is σ = 29001888. Its totient is φ = 12889664.

The previous prime is 20542939. The next prime is 20542961. The reversal of 20542953 is 35924502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20542953 - 2⁶ = 20542889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20542953.

It is not an unprimeable number, because it can be changed into a prime (20542993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201351 + ... + 201452.

It is an arithmetic number, because the mean of its divisors is an integer number (3625236).

Almost surely, 2^20542953 is an apocalyptic number.

It is an amenable number.

20542953 is a deficient number, since it is larger than the sum of its proper divisors (8458935).

20542953 is a wasteful number, since it uses less digits than its factorization.

20542953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402823.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20542953 is about 4532.4334523521. The cubic root of 20542953 is about 273.8761983556.

The spelling of 20542953 in words is "twenty million, five hundred forty-two thousand, nine hundred fifty-three".