19924225418 has 4 divisors (see below), whose sum is σ = 29886338130. Its totient is φ = 9962112708.

The previous prime is 19924225411. The next prime is 19924225429. The reversal of 19924225418 is 81452242991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19638378769 + 285846649 = 140137^2 + 16907^2 .

It is a super-4 number, since 4×19924225418⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (19924225411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4981056353 + ... + 4981056356.

Almost surely, 2^19924225418 is an apocalyptic number.

19924225418 is a deficient number, since it is larger than the sum of its proper divisors (9962112712).

19924225418 is an equidigital number, since it uses as much as digits as its factorization.

19924225418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9962112711.

The product of its digits is 414720, while the sum is 47.

The spelling of 19924225418 in words is "nineteen billion, nine hundred twenty-four million, two hundred twenty-five thousand, four hundred eighteen".