20349642 has 32 divisors (see below), whose sum is σ = 41674752. Its totient is φ = 6622704.

The previous prime is 20349613. The next prime is 20349643. The reversal of 20349642 is 24694302.

It is not an unprimeable number, because it can be changed into a prime (20349643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89533 + ... + 89759.

It is an arithmetic number, because the mean of its divisors is an integer number (1302336).

Almost surely, 2^20349642 is an apocalyptic number.

20349642 is an abundant number, since it is smaller than the sum of its proper divisors (21325110).

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

20349642 is a wasteful number, since it uses less digits than its factorization.

20349642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20349642 is about 4511.0577473582. The cubic root of 20349642 is about 273.0144231535.

The spelling of 20349642 in words is "twenty million, three hundred forty-nine thousand, six hundred forty-two".