20147255028 has 108 divisors (see below), whose sum is σ = 53344238220. Its totient is φ = 6410460672.

The previous prime is 20147254997. The next prime is 20147255039. The reversal of 20147255028 is 82055274102.

It is a happy number.

20147255028 is a `hidden beast` number, since 2 + 0 + 14 + 72 + 550 + 28 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 431725284 + 19715529744 = 20778^2 + 140412^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20147254983 and 20147255001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2690826 + ... + 2698302.

Almost surely, 2^20147255028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20147255028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26672119110).

20147255028 is an abundant number, since it is smaller than the sum of its proper divisors (33196983192).

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

20147255028 is a wasteful number, since it uses less digits than its factorization.

20147255028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7634 (or 7600 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The spelling of 20147255028 in words is "twenty billion, one hundred forty-seven million, two hundred fifty-five thousand, twenty-eight".