20982537 has 16 divisors (see below), whose sum is σ = 31162560. Its totient is φ = 13953600.

The previous prime is 20982503. The next prime is 20982553. The reversal of 20982537 is 73528902.

It is a happy number.

It is not a de Polignac number, because 20982537 - 2⁸ = 20982281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20982337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14737 + ... + 16097.

It is an arithmetic number, because the mean of its divisors is an integer number (1947660).

Almost surely, 2^20982537 is an apocalyptic number.

20982537 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20982537 is a deficient number, since it is larger than the sum of its proper divisors (10180023).

20982537 is a wasteful number, since it uses less digits than its factorization.

20982537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941 (or 1935 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 20982537 is about 4580.6699291697. The cubic root of 20982537 is about 275.8159216796.

The spelling of 20982537 in words is "twenty million, nine hundred eighty-two thousand, five hundred thirty-seven".