20143516 has 12 divisors (see below), whose sum is σ = 36466920. Its totient is φ = 9724400.

The previous prime is 20143489. The next prime is 20143517. The reversal of 20143516 is 61534102.

It is a super-2 number, since 2×20143516² = 811522473684512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143517) 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, 86710 + ... + 86941.

It is an arithmetic number, because the mean of its divisors is an integer number (3038910).

Almost surely, 2^20143516 is an apocalyptic number.

It is an amenable number.

20143516 is a deficient number, since it is larger than the sum of its proper divisors (16323404).

20143516 is a wasteful number, since it uses less digits than its factorization.

20143516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173684 (or 173682 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20143516 is about 4488.1528494471. The cubic root of 20143516 is about 272.0894854070.

Adding to 20143516 its reverse (61534102), we get a palindrome (81677618).

The spelling of 20143516 in words is "twenty million, one hundred forty-three thousand, five hundred sixteen".