20885550671 has 12 divisors (see below), whose sum is σ = 22753710144. Its totient is φ = 19148032800.

The previous prime is 20885550649. The next prime is 20885550737. The reversal of 20885550671 is 17605558802.

It is a happy number.

It is not a de Polignac number, because 20885550671 - 2¹⁰ = 20885549647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20885550601) 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, 921950 + ... + 944331.

It is an arithmetic number, because the mean of its divisors is an integer number (1896142512).

Almost surely, 2^20885550671 is an apocalyptic number.

20885550671 is a deficient number, since it is larger than the sum of its proper divisors (1868159473).

20885550671 is a wasteful number, since it uses less digits than its factorization.

20885550671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866350 (or 1866331 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 20885550671 in words is "twenty billion, eight hundred eighty-five million, five hundred fifty thousand, six hundred seventy-one".