20131842 has 16 divisors (see below), whose sum is σ = 42632352. Its totient is φ = 6315840.

The previous prime is 20131819. The next prime is 20131871. The reversal of 20131842 is 24813102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98584 + ... + 98787.

It is an arithmetic number, because the mean of its divisors is an integer number (2664522).

Almost surely, 2^20131842 is an apocalyptic number.

20131842 is an abundant number, since it is smaller than the sum of its proper divisors (22500510).

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

20131842 is a wasteful number, since it uses less digits than its factorization.

20131842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197393.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20131842 is about 4486.8521259342. The cubic root of 20131842 is about 272.0369128825.

Adding to 20131842 its reverse (24813102), we get a palindrome (44944944).

The spelling of 20131842 in words is "twenty million, one hundred thirty-one thousand, eight hundred forty-two".