20806455850 has 48 divisors (see below), whose sum is σ = 39628320768. Its totient is φ = 8123887040.

The previous prime is 20806455827. The next prime is 20806455869. The reversal of 20806455850 is 5855460802.

It is a super-3 number, since 3×20806455850³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20806455797 and 20806455806.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 888492 + ... + 911608.

It is an arithmetic number, because the mean of its divisors is an integer number (825590016).

Almost surely, 2^20806455850 is an apocalyptic number.

20806455850 is a deficient number, since it is larger than the sum of its proper divisors (18821864918).

20806455850 is a wasteful number, since it uses less digits than its factorization.

20806455850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23559 (or 23554 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 43.

The spelling of 20806455850 in words is "twenty billion, eight hundred six million, four hundred fifty-five thousand, eight hundred fifty".