20331342 has 12 divisors (see below), whose sum is σ = 44051280. Its totient is φ = 6777108.

The previous prime is 20331329. The next prime is 20331373. The reversal of 20331342 is 24313302.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1129519 = 20331342 / (2 + 0 + 3 + 3 + 1 + 3 + 4 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564742 + ... + 564777.

It is an arithmetic number, because the mean of its divisors is an integer number (3670940).

Almost surely, 2^20331342 is an apocalyptic number.

20331342 is an abundant number, since it is smaller than the sum of its proper divisors (23719938).

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

20331342 is a wasteful number, since it uses less digits than its factorization.

20331342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129527 (or 1129524 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20331342 is about 4509.0289420229. The cubic root of 20331342 is about 272.9325599224.

Adding to 20331342 its reverse (24313302), we get a palindrome (44644644).

It can be divided in two parts, 2033134 and 2, that added together give a triangular number (2033136 = T₂₀₁₆).

The spelling of 20331342 in words is "twenty million, three hundred thirty-one thousand, three hundred forty-two".