20653953238 has 4 divisors (see below), whose sum is σ = 30980929860. Its totient is φ = 10326976618.

The previous prime is 20653953233. The next prime is 20653953251. The reversal of 20653953238 is 83235935602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20653953233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5163488308 + ... + 5163488311.

It is an arithmetic number, because the mean of its divisors is an integer number (7745232465).

Almost surely, 2^20653953238 is an apocalyptic number.

20653953238 is a deficient number, since it is larger than the sum of its proper divisors (10326976622).

20653953238 is a wasteful number, since it uses less digits than its factorization.

20653953238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10326976621.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 20653953238 in words is "twenty billion, six hundred fifty-three million, nine hundred fifty-three thousand, two hundred thirty-eight".