20415142 has 8 divisors (see below), whose sum is σ = 33406632. Its totient is φ = 9279600.

The previous prime is 20415133. The next prime is 20415149. The reversal of 20415142 is 24151402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20415142³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463959 + ... + 464002.

It is an arithmetic number, because the mean of its divisors is an integer number (4175829).

Almost surely, 2^20415142 is an apocalyptic number.

20415142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20415142 is a deficient number, since it is larger than the sum of its proper divisors (12991490).

20415142 is a wasteful number, since it uses less digits than its factorization.

20415142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927974.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20415142 is about 4518.3118528937. The cubic root of 20415142 is about 273.3070293281.

Adding to 20415142 its reverse (24151402), we get a palindrome (44566544).

The spelling of 20415142 in words is "twenty million, four hundred fifteen thousand, one hundred forty-two".