20777396 has 6 divisors (see below), whose sum is σ = 36360450. Its totient is φ = 10388696.

The previous prime is 20777389. The next prime is 20777401. The reversal of 20777396 is 69377702.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 1240996 = 4420^2 + 1114^2 .

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, 2597171 + ... + 2597178.

It is an arithmetic number, because the mean of its divisors is an integer number (6060075).

Almost surely, 2^20777396 is an apocalyptic number.

It is an amenable number.

20777396 is a deficient number, since it is larger than the sum of its proper divisors (15583054).

20777396 is a wasteful number, since it uses less digits than its factorization.

20777396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5194353 (or 5194351 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 20777396 is about 4558.2228993326. Note that the first 3 decimals coincide. The cubic root of 20777396 is about 274.9141153291.

The spelling of 20777396 in words is "twenty million, seven hundred seventy-seven thousand, three hundred ninety-six".