20169942 has 32 divisors (see below), whose sum is σ = 45335808. Its totient is φ = 5935776.

The previous prime is 20169937. The next prime is 20169943. The reversal of 20169942 is 24996102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20169943) 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 15 ways as a sum of consecutive naturals, for example, 3828 + ... + 7415.

It is an arithmetic number, because the mean of its divisors is an integer number (1416744).

Almost surely, 2^20169942 is an apocalyptic number.

20169942 is an abundant number, since it is smaller than the sum of its proper divisors (25165866).

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

20169942 is a wasteful number, since it uses less digits than its factorization.

20169942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11284.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 20169942 is about 4491.0958573604. The cubic root of 20169942 is about 272.2084168913.

The spelling of 20169942 in words is "twenty million, one hundred sixty-nine thousand, nine hundred forty-two".