20121342 has 16 divisors (see below), whose sum is σ = 42360960. Its totient is φ = 6354072.

The previous prime is 20121337. The next prime is 20121347. The reversal of 20121342 is 24312102.

It is an interprime number because it is at equal distance from previous prime (20121337) and next prime (20121347).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121347) 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, 88138 + ... + 88365.

It is an arithmetic number, because the mean of its divisors is an integer number (2647560).

Almost surely, 2^20121342 is an apocalyptic number.

20121342 is an abundant number, since it is smaller than the sum of its proper divisors (22239618).

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

20121342 is a wasteful number, since it uses less digits than its factorization.

20121342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176527.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20121342 is about 4485.6818879631. The cubic root of 20121342 is about 271.9896099693.

Adding to 20121342 its reverse (24312102), we get a palindrome (44433444).

The spelling of 20121342 in words is "twenty million, one hundred twenty-one thousand, three hundred forty-two".