20342516 has 6 divisors (see below), whose sum is σ = 35599410. Its totient is φ = 10171256.

The previous prime is 20342503. The next prime is 20342527. The reversal of 20342516 is 61524302.

It can be written as a sum of positive squares in only one way, i.e., 14092516 + 6250000 = 3754^2 + 2500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20342491 and 20342500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2542811 + ... + 2542818.

It is an arithmetic number, because the mean of its divisors is an integer number (5933235).

Almost surely, 2^20342516 is an apocalyptic number.

It is an amenable number.

20342516 is a deficient number, since it is larger than the sum of its proper divisors (15256894).

20342516 is a wasteful number, since it uses less digits than its factorization.

20342516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085633 (or 5085631 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20342516 is about 4510.2678412706. The cubic root of 20342516 is about 272.9825515377.

Adding to 20342516 its reverse (61524302), we get a palindrome (81866818).

The spelling of 20342516 in words is "twenty million, three hundred forty-two thousand, five hundred sixteen".