20687452 has 12 divisors (see below), whose sum is σ = 37086336. Its totient is φ = 10091360.

The previous prime is 20687449. The next prime is 20687461. The reversal of 20687452 is 25478602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62908 + ... + 63235.

It is an arithmetic number, because the mean of its divisors is an integer number (3090528).

Almost surely, 2^20687452 is an apocalyptic number.

It is an amenable number.

20687452 is a deficient number, since it is larger than the sum of its proper divisors (16398884).

20687452 is a wasteful number, since it uses less digits than its factorization.

20687452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126188 (or 126186 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 20687452 is about 4548.3460730248. The cubic root of 20687452 is about 274.5168463997.

The spelling of 20687452 in words is "twenty million, six hundred eighty-seven thousand, four hundred fifty-two".