20755634 has 4 divisors (see below), whose sum is σ = 31133454. Its totient is φ = 10377816.

The previous prime is 20755613. The next prime is 20755649. The reversal of 20755634 is 43655702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16120225 + 4635409 = 4015^2 + 2153^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20755634.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5188907 + ... + 5188910.

Almost surely, 2^20755634 is an apocalyptic number.

20755634 is a deficient number, since it is larger than the sum of its proper divisors (10377820).

20755634 is a wasteful number, since it uses less digits than its factorization.

20755634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10377819.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 20755634 is about 4555.8351594411. The cubic root of 20755634 is about 274.8181011971.

The spelling of 20755634 in words is "twenty million, seven hundred fifty-five thousand, six hundred thirty-four".