20135516 has 24 divisors (see below), whose sum is σ = 37255680. Its totient is φ = 9495792.

The previous prime is 20135513. The next prime is 20135537. The reversal of 20135516 is 61553102.

It is a junction number, because it is equal to n+sod(n) for n = 20135491 and 20135500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22901 + ... + 23763.

It is an arithmetic number, because the mean of its divisors is an integer number (1552320).

Almost surely, 2^20135516 is an apocalyptic number.

It is an amenable number.

20135516 is a deficient number, since it is larger than the sum of its proper divisors (17120164).

20135516 is a wasteful number, since it uses less digits than its factorization.

20135516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 20135516 is about 4487.2615256969. The cubic root of 20135516 is about 272.0534605126.

Adding to 20135516 its reverse (61553102), we get a palindrome (81688618).

The spelling of 20135516 in words is "twenty million, one hundred thirty-five thousand, five hundred sixteen".