20351683248394 has 4 divisors (see below), whose sum is σ = 30527524872594. Its totient is φ = 10175841624196.

The previous prime is 20351683248383. The next prime is 20351683248451. The reversal of 20351683248394 is 49384238615302.

It is a happy number.

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., 20299304975625 + 52378272769 = 4505475^2 + 228863^2 .

It is a super-2 number, since 2×20351683248394² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5087920812097 + ... + 5087920812100.

Almost surely, 2^{20351683248394} is an apocalyptic number.

20351683248394 is a deficient number, since it is larger than the sum of its proper divisors (10175841624200).

20351683248394 is a wasteful number, since it uses less digits than its factorization.

20351683248394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10175841624199.

The product of its (nonzero) digits is 29859840, while the sum is 58.

The spelling of 20351683248394 in words is "twenty trillion, three hundred fifty-one billion, six hundred eighty-three million, two hundred forty-eight thousand, three hundred ninety-four".