20542955 has 8 divisors (see below), whose sum is σ = 25318032. Its totient is φ = 15990048.

The previous prime is 20542939. The next prime is 20542961. The reversal of 20542955 is 55924502.

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 20542955 - 2⁴ = 20542939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55337 + ... + 55706.

It is an arithmetic number, because the mean of its divisors is an integer number (3164754).

Almost surely, 2^20542955 is an apocalyptic number.

20542955 is a deficient number, since it is larger than the sum of its proper divisors (4775077).

20542955 is a wasteful number, since it uses less digits than its factorization.

20542955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111085.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 20542955 is about 4532.4336729841. The cubic root of 20542955 is about 273.8762072435.

The spelling of 20542955 in words is "twenty million, five hundred forty-two thousand, nine hundred fifty-five".