20696400834 has 8 divisors (see below), whose sum is σ = 41392801680. Its totient is φ = 6898800276.

The previous prime is 20696400793. The next prime is 20696400839. The reversal of 20696400834 is 43800469602.

It is a happy number.

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

20696400834 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20696400839) 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, 1724700064 + ... + 1724700075.

It is an arithmetic number, because the mean of its divisors is an integer number (5174100210).

Almost surely, 2^20696400834 is an apocalyptic number.

20696400834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20696400834 is a wasteful number, since it uses less digits than its factorization.

20696400834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449400144.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 20696400834 in words is "twenty billion, six hundred ninety-six million, four hundred thousand, eight hundred thirty-four".