20682477 has 24 divisors (see below), whose sum is σ = 30747288. Its totient is φ = 13392000.

The previous prime is 20682463. The next prime is 20682499. The reversal of 20682477 is 77428602.

It can be written as a sum of positive squares in 4 ways, for example, as 3218436 + 17464041 = 1794^2 + 4179^2 .

It is not a de Polignac number, because 20682477 - 2⁴ = 20682461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20682407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55263 + ... + 55635.

It is an arithmetic number, because the mean of its divisors is an integer number (1281137).

Almost surely, 2^20682477 is an apocalyptic number.

It is an amenable number.

20682477 is a deficient number, since it is larger than the sum of its proper divisors (10064811).

20682477 is a wasteful number, since it uses less digits than its factorization.

20682477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 20682477 is about 4547.7991380447. The cubic root of 20682477 is about 274.4948390044.

The spelling of 20682477 in words is "twenty million, six hundred eighty-two thousand, four hundred seventy-seven".