18228894970 has 256 divisors, whose sum is σ = 41590112256. Its totient is φ = 5660928000.

The previous prime is 18228894949. The next prime is 18228894977. The reversal of 18228894970 is 7949882281.

It is a super-2 number, since 2×18228894970² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18228894977) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 139151805 + ... + 139151935.

It is an arithmetic number, because the mean of its divisors is an integer number (162461376).

Almost surely, 2^18228894970 is an apocalyptic number.

18228894970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18228894970 is an abundant number, since it is smaller than the sum of its proper divisors (23361217286).

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

18228894970 is a wasteful number, since it uses less digits than its factorization.

18228894970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 18228894970 in words is "eighteen billion, two hundred twenty-eight million, eight hundred ninety-four thousand, nine hundred seventy".