20761238 has 4 divisors (see below), whose sum is σ = 31141860. Its totient is φ = 10380618.

The previous prime is 20761229. The next prime is 20761253. The reversal of 20761238 is 83216702.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20761238.

It is a congruent number.

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, 5190308 + ... + 5190311.

It is an arithmetic number, because the mean of its divisors is an integer number (7785465).

Almost surely, 2^20761238 is an apocalyptic number.

20761238 is a deficient number, since it is larger than the sum of its proper divisors (10380622).

20761238 is a wasteful number, since it uses less digits than its factorization.

20761238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10380621.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20761238 is about 4556.4501533540. The cubic root of 20761238 is about 274.8428325071.

The spelling of 20761238 in words is "twenty million, seven hundred sixty-one thousand, two hundred thirty-eight".