20858006431 has 8 divisors (see below), whose sum is σ = 21351421520. Its totient is φ = 20364970752.

The previous prime is 20858006419. The next prime is 20858006467. The reversal of 20858006431 is 13460085802.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20858006431 - 2⁹ = 20858005919 is a prime.

It is a super-2 number, since 2×20858006431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858006471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17965 + ... + 205033.

It is an arithmetic number, because the mean of its divisors is an integer number (2668927690).

Almost surely, 2^20858006431 is an apocalyptic number.

20858006431 is a deficient number, since it is larger than the sum of its proper divisors (493415089).

20858006431 is a wasteful number, since it uses less digits than its factorization.

20858006431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189705.

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 20858006431 in words is "twenty billion, eight hundred fifty-eight million, six thousand, four hundred thirty-one".