20616142 has 8 divisors (see below), whose sum is σ = 32268816. Its totient is φ = 9859872.

The previous prime is 20616139. The next prime is 20616143. The reversal of 20616142 is 24161602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616143) 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, 224043 + ... + 224134.

It is an arithmetic number, because the mean of its divisors is an integer number (4033602).

Almost surely, 2^20616142 is an apocalyptic number.

20616142 is a deficient number, since it is larger than the sum of its proper divisors (11652674).

20616142 is a wasteful number, since it uses less digits than its factorization.

20616142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448202.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20616142 is about 4540.5001927100. The cubic root of 20616142 is about 274.2010618653.

Adding to 20616142 its reverse (24161602), we get a palindrome (44777744).

The spelling of 20616142 in words is "twenty million, six hundred sixteen thousand, one hundred forty-two".