20797982 has 16 divisors (see below), whose sum is σ = 32080752. Its totient is φ = 10106880.

The previous prime is 20797981. The next prime is 20797999. The reversal of 20797982 is 28979702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20797981) 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, 21632 + ... + 22572.

It is an arithmetic number, because the mean of its divisors is an integer number (2005047).

Almost surely, 2^20797982 is an apocalyptic number.

20797982 is a deficient number, since it is larger than the sum of its proper divisors (11282770).

20797982 is a wasteful number, since it uses less digits than its factorization.

20797982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 20797982 is about 4560.4804571448. The cubic root of 20797982 is about 275.0048792523.

It can be divided in two parts, 207 and 97982, that added together give a palindrome (98189).

The spelling of 20797982 in words is "twenty million, seven hundred ninety-seven thousand, nine hundred eighty-two".