20788982 has 4 divisors (see below), whose sum is σ = 31183476. Its totient is φ = 10394490.

The previous prime is 20788951. The next prime is 20788991. The reversal of 20788982 is 28988702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28988702 = 2 ⋅14494351.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5197244 + ... + 5197247.

It is an arithmetic number, because the mean of its divisors is an integer number (7795869).

Almost surely, 2^20788982 is an apocalyptic number.

20788982 is a deficient number, since it is larger than the sum of its proper divisors (10394494).

20788982 is a wasteful number, since it uses less digits than its factorization.

20788982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10394493.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 20788982 is about 4559.4936122337. The cubic root of 20788982 is about 274.9652055152.

The spelling of 20788982 in words is "twenty million, seven hundred eighty-eight thousand, nine hundred eighty-two".