20938516 has 24 divisors (see below), whose sum is σ = 38142720. Its totient is φ = 10046400.

The previous prime is 20938507. The next prime is 20938529. The reversal of 20938516 is 61583902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15600 + ... + 16888.

It is an arithmetic number, because the mean of its divisors is an integer number (1589280).

Almost surely, 2^20938516 is an apocalyptic number.

It is an amenable number.

20938516 is a deficient number, since it is larger than the sum of its proper divisors (17204204).

20938516 is a wasteful number, since it uses less digits than its factorization.

20938516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455 (or 1453 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 20938516 is about 4575.8623231037. The cubic root of 20938516 is about 275.6229009529.

It can be divided in two parts, 2093 and 8516, that added together give a square (10609 = 103²).

The spelling of 20938516 in words is "twenty million, nine hundred thirty-eight thousand, five hundred sixteen".