20117037223651 has 4 divisors (see below), whose sum is σ = 21300392354472. Its totient is φ = 18933682092832.

The previous prime is 20117037223631. The next prime is 20117037223687. The reversal of 20117037223651 is 15632273071102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20117037223651 - 2¹⁹ = 20117036699363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20117037223631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591677565385 + ... + 591677565418.

It is an arithmetic number, because the mean of its divisors is an integer number (5325098088618).

Almost surely, 2^{20117037223651} is an apocalyptic number.

20117037223651 is a deficient number, since it is larger than the sum of its proper divisors (1183355130821).

20117037223651 is a wasteful number, since it uses less digits than its factorization.

20117037223651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183355130820.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 20117037223651 in words is "twenty trillion, one hundred seventeen billion, thirty-seven million, two hundred twenty-three thousand, six hundred fifty-one".