20855398150 has 12 divisors (see below), whose sum is σ = 38791040652. Its totient is φ = 8342159240.

The previous prime is 20855398121. The next prime is 20855398163. The reversal of 20855398150 is 5189355802.

It is a self number, because there is not a number n which added to its sum of digits gives 20855398150.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208553932 + ... + 208554031.

It is an arithmetic number, because the mean of its divisors is an integer number (3232586721).

Almost surely, 2^20855398150 is an apocalyptic number.

20855398150 is a deficient number, since it is larger than the sum of its proper divisors (17935642502).

20855398150 is a wasteful number, since it uses less digits than its factorization.

20855398150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417107975 (or 417107970 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 46.

The spelling of 20855398150 in words is "twenty billion, eight hundred fifty-five million, three hundred ninety-eight thousand, one hundred fifty".