23420142 has 12 divisors (see below), whose sum is σ = 50743680. Its totient is φ = 7806708.

The previous prime is 23420123. The next prime is 23420167. The reversal of 23420142 is 24102432.

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: 1301119 = 23420142 / (2 + 3 + 4 + 2 + 0 + 1 + 4 + 2).

It is a plaindrome in base 11.

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, 650542 + ... + 650577.

It is an arithmetic number, because the mean of its divisors is an integer number (4228640).

Almost surely, 2^23420142 is an apocalyptic number.

23420142 is an abundant number, since it is smaller than the sum of its proper divisors (27323538).

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

23420142 is a wasteful number, since it uses less digits than its factorization.

23420142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301127 (or 1301124 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 23420142 is about 4839.4361241781. The cubic root of 23420142 is about 286.1078944797.

Adding to 23420142 its reverse (24102432), we get a palindrome (47522574).

The spelling of 23420142 in words is "twenty-three million, four hundred twenty thousand, one hundred forty-two".