20211842 has 16 divisors (see below), whose sum is σ = 35586240. Its totient is φ = 8427888.

The previous prime is 20211797. The next prime is 20211847. The reversal of 20211842 is 24811202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20211847) 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, 18992 + ... + 20027.

It is an arithmetic number, because the mean of its divisors is an integer number (2224140).

Almost surely, 2^20211842 is an apocalyptic number.

20211842 is a deficient number, since it is larger than the sum of its proper divisors (15374398).

20211842 is a wasteful number, since it uses less digits than its factorization.

20211842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39065.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 20211842 is about 4495.7582230365. The cubic root of 20211842 is about 272.3967771093.

The spelling of 20211842 in words is "twenty million, two hundred eleven thousand, eight hundred forty-two".