20161442 has 24 divisors (see below), whose sum is σ = 35335440. Its totient is φ = 8602440.

The previous prime is 20161441. The next prime is 20161457. The reversal of 20161442 is 24416102.

It is not an unprimeable number, because it can be changed into a prime (20161441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40817 + ... + 41307.

It is an arithmetic number, because the mean of its divisors is an integer number (1472310).

Almost surely, 2^20161442 is an apocalyptic number.

20161442 is a deficient number, since it is larger than the sum of its proper divisors (15173998).

20161442 is a wasteful number, since it uses less digits than its factorization.

20161442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20161442 is about 4490.1494407202. The cubic root of 20161442 is about 272.1701735713.

Adding to 20161442 its reverse (24416102), we get a palindrome (44577544).

The spelling of 20161442 in words is "twenty million, one hundred sixty-one thousand, four hundred forty-two".