20853542 has 4 divisors (see below), whose sum is σ = 31280316. Its totient is φ = 10426770.

The previous prime is 20853541. The next prime is 20853557. The reversal of 20853542 is 24535802.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5213384 + ... + 5213387.

It is an arithmetic number, because the mean of its divisors is an integer number (7820079).

Almost surely, 2^20853542 is an apocalyptic number.

20853542 is a deficient number, since it is larger than the sum of its proper divisors (10426774).

20853542 is a wasteful number, since it uses less digits than its factorization.

20853542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10426773.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 20853542 is about 4566.5678578118. The cubic root of 20853542 is about 275.2495453854.

The spelling of 20853542 in words is "twenty million, eight hundred fifty-three thousand, five hundred forty-two".