20834012457 has 16 divisors (see below), whose sum is σ = 30867472000. Its totient is φ = 13888320912.

The previous prime is 20834012417. The next prime is 20834012471. The reversal of 20834012457 is 75421043802.

It is a happy number.

20834012457 is a `hidden beast` number, since 2 + 0 + 8 + 3 + 401 + 245 + 7 = 666.

It is not a de Polignac number, because 20834012457 - 2⁸ = 20834012201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20834012417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595044 + ... + 629082.

It is an arithmetic number, because the mean of its divisors is an integer number (1929217000).

Almost surely, 2^20834012457 is an apocalyptic number.

20834012457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20834012457 is a deficient number, since it is larger than the sum of its proper divisors (10033459543).

20834012457 is a wasteful number, since it uses less digits than its factorization.

20834012457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56717 (or 56711 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 20834012457 in words is "twenty billion, eight hundred thirty-four million, twelve thousand, four hundred fifty-seven".