20855242028 has 48 divisors (see below), whose sum is σ = 37332731520. Its totient is φ = 10192342656.

The previous prime is 20855242027. The next prime is 20855242069. The reversal of 20855242028 is 82024255802.

It is a super-2 number, since 2×20855242028² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20855241982 and 20855242000.

It is not an unprimeable number, because it can be changed into a prime (20855242027) 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, 10494851 + ... + 10496837.

It is an arithmetic number, because the mean of its divisors is an integer number (777765240).

Almost surely, 2^20855242028 is an apocalyptic number.

It is an amenable number.

20855242028 is a deficient number, since it is larger than the sum of its proper divisors (16477489492).

20855242028 is a wasteful number, since it uses less digits than its factorization.

20855242028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414 (or 2412 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 38.

The spelling of 20855242028 in words is "twenty billion, eight hundred fifty-five million, two hundred forty-two thousand, twenty-eight".