20994486834 has 8 divisors (see below), whose sum is σ = 41988973680. Its totient is φ = 6998162276.

The previous prime is 20994486833. The next prime is 20994486853. The reversal of 20994486834 is 43868449902.

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

20994486834 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20994486833) 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, 1749540564 + ... + 1749540575.

It is an arithmetic number, because the mean of its divisors is an integer number (5248621710).

Almost surely, 2^20994486834 is an apocalyptic number.

20994486834 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.

20994486834 is a wasteful number, since it uses less digits than its factorization.

20994486834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499081144.

The product of its (nonzero) digits is 11943936, while the sum is 57.

The spelling of 20994486834 in words is "twenty billion, nine hundred ninety-four million, four hundred eighty-six thousand, eight hundred thirty-four".