21292785059 has 12 divisors (see below), whose sum is σ = 26350497936. Its totient is φ = 16847037792.

The previous prime is 21292785047. The next prime is 21292785067. The reversal of 21292785059 is 95058729212.

It is a happy number.

It is not a de Polignac number, because 21292785059 - 2²⁰ = 21291736483 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21292784998 and 21292785016.

It is not an unprimeable number, because it can be changed into a prime (21292785079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8998304 + ... + 9000669.

It is an arithmetic number, because the mean of its divisors is an integer number (2195874828).

Almost surely, 2^21292785059 is an apocalyptic number.

21292785059 is a deficient number, since it is larger than the sum of its proper divisors (5057712877).

21292785059 is a wasteful number, since it uses less digits than its factorization.

21292785059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17999006 (or 17998993 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 50.

The spelling of 21292785059 in words is "twenty-one billion, two hundred ninety-two million, seven hundred eighty-five thousand, fifty-nine".