19772442 has 12 divisors (see below), whose sum is σ = 42840330. Its totient is φ = 6590808.

The previous prime is 19772429. The next prime is 19772453. The reversal of 19772442 is 24427791.

It can be written as a sum of positive squares in only one way, i.e., 12595401 + 7177041 = 3549^2 + 2679^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19772397 and 19772406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 549217 + ... + 549252.

Almost surely, 2^19772442 is an apocalyptic number.

19772442 is an abundant number, since it is smaller than the sum of its proper divisors (23067888).

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

19772442 is a wasteful number, since it uses less digits than its factorization.

19772442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098477 (or 1098474 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 19772442 is about 4446.6214140626. The cubic root of 19772442 is about 270.4083532806.

The spelling of 19772442 in words is "nineteen million, seven hundred seventy-two thousand, four hundred forty-two".