20231516 has 6 divisors (see below), whose sum is σ = 35405160. Its totient is φ = 10115756.

The previous prime is 20231507. The next prime is 20231527. The reversal of 20231516 is 61513202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2528936 + ... + 2528943.

It is an arithmetic number, because the mean of its divisors is an integer number (5900860).

Almost surely, 2^20231516 is an apocalyptic number.

It is an amenable number.

20231516 is a deficient number, since it is larger than the sum of its proper divisors (15173644).

20231516 is a wasteful number, since it uses less digits than its factorization.

20231516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057883 (or 5057881 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20231516 is about 4497.9457533412. The cubic root of 20231516 is about 272.4851311922.

Adding to 20231516 its reverse (61513202), we get a palindrome (81744718).

The spelling of 20231516 in words is "twenty million, two hundred thirty-one thousand, five hundred sixteen".