10509858421 has 16 divisors (see below), whose sum is σ = 11039039488. Its totient is φ = 9992937600.

The previous prime is 10509858413. The next prime is 10509858431. The reversal of 10509858421 is 12485890501.

It is a cyclic number.

It is not a de Polignac number, because 10509858421 - 2³ = 10509858413 is a prime.

It is a super-2 number, since 2×10509858421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10509858431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2052961 + ... + 2058073.

It is an arithmetic number, because the mean of its divisors is an integer number (689939968).

Almost surely, 2^10509858421 is an apocalyptic number.

It is an amenable number.

10509858421 is a deficient number, since it is larger than the sum of its proper divisors (529181067).

10509858421 is a wasteful number, since it uses less digits than its factorization.

10509858421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6292.

The product of its (nonzero) digits is 115200, while the sum is 43.

The spelling of 10509858421 in words is "ten billion, five hundred nine million, eight hundred fifty-eight thousand, four hundred twenty-one".