20117738 has 8 divisors (see below), whose sum is σ = 30515940. Its totient is φ = 9945760.

The previous prime is 20117737. The next prime is 20117759. The reversal of 20117738 is 83771102.

It can be written as a sum of positive squares in 2 ways, for example, as 20097289 + 20449 = 4483^2 + 143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20117738.

It is not an unprimeable number, because it can be changed into a prime (20117731) 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, 56333 + ... + 56688.

Almost surely, 2^20117738 is an apocalyptic number.

20117738 is a deficient number, since it is larger than the sum of its proper divisors (10398202).

20117738 is a wasteful number, since it uses less digits than its factorization.

20117738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113112.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 20117738 is about 4485.2801473264. The cubic root of 20117738 is about 271.9733700140.

The spelling of 20117738 in words is "twenty million, one hundred seventeen thousand, seven hundred thirty-eight".