20727642 has 16 divisors (see below), whose sum is σ = 44644320. Its totient is φ = 6377712.

The previous prime is 20727601. The next prime is 20727643. The reversal of 20727642 is 24672702.

It is not an unprimeable number, because it can be changed into a prime (20727643) 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 in 7 ways as a sum of consecutive naturals, for example, 132792 + ... + 132947.

It is an arithmetic number, because the mean of its divisors is an integer number (2790270).

Almost surely, 2^20727642 is an apocalyptic number.

20727642 is an abundant number, since it is smaller than the sum of its proper divisors (23916678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20727642 is a wasteful number, since it uses less digits than its factorization.

20727642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265757.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 20727642 is about 4552.7620188189. The cubic root of 20727642 is about 274.6945015177.

The spelling of 20727642 in words is "twenty million, seven hundred twenty-seven thousand, six hundred forty-two".