18820422072 has 96 divisors (see below), whose sum is σ = 52519175280. Its totient is φ = 6084149760.

The previous prime is 18820422053. The next prime is 18820422077. The reversal of 18820422072 is 27022402881.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18820422077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 822547 + ... + 845117.

Almost surely, 2^18820422072 is an apocalyptic number.

18820422072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18820422072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26259587640).

18820422072 is an abundant number, since it is smaller than the sum of its proper divisors (33698753208).

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

18820422072 is a wasteful number, since it uses less digits than its factorization.

18820422072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22933 (or 22926 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

It can be divided in two parts, 188204 and 22072, that added together give a triangular number (210276 = T₆₄₈).

The spelling of 18820422072 in words is "eighteen billion, eight hundred twenty million, four hundred twenty-two thousand, seventy-two".