20555034906 has 32 divisors (see below), whose sum is σ = 46990356480. Its totient is φ = 5871939696.

The previous prime is 20555034901. The next prime is 20555034947. The reversal of 20555034906 is 60943055502.

It is not an unprimeable number, because it can be changed into a prime (20555034901) 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, 257115 + ... + 327441.

It is an arithmetic number, because the mean of its divisors is an integer number (1468448640).

Almost surely, 2^20555034906 is an apocalyptic number.

20555034906 is an abundant number, since it is smaller than the sum of its proper divisors (26435321574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20555034906 is a wasteful number, since it uses less digits than its factorization.

20555034906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77298.

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 20555034906 in words is "twenty billion, five hundred fifty-five million, thirty-four thousand, nine hundred six".