20502422028 has 96 divisors (see below), whose sum is σ = 58196920320. Its totient is φ = 6190326720.

The previous prime is 20502422027. The next prime is 20502422029. The reversal of 20502422028 is 82022420502.

It is an interprime number because it is at equal distance from previous prime (20502422027) and next prime (20502422029).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20502421992 and 20502422010.

It is not an unprimeable number, because it can be changed into a prime (20502422027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297925 + ... + 360227.

It is an arithmetic number, because the mean of its divisors is an integer number (606217920).

Almost surely, 2^20502422028 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 20502422028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29098460160).

20502422028 is an abundant number, since it is smaller than the sum of its proper divisors (37694498292).

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

20502422028 is a wasteful number, since it uses less digits than its factorization.

20502422028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62604 (or 62596 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The spelling of 20502422028 in words is "twenty billion, five hundred two million, four hundred twenty-two thousand, twenty-eight".