20351342 has 16 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 9093240.

The previous prime is 20351339. The next prime is 20351371. The reversal of 20351342 is 24315302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6542 + ... + 9137.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^20351342 is an apocalyptic number.

20351342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20351342 is a deficient number, since it is larger than the sum of its proper divisors (13517458).

20351342 is a wasteful number, since it uses less digits than its factorization.

20351342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15751.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20351342 is about 4511.2461692973. The cubic root of 20351342 is about 273.0220254428.

Adding to 20351342 its reverse (24315302), we get a palindrome (44666644).

The spelling of 20351342 in words is "twenty million, three hundred fifty-one thousand, three hundred forty-two".