19492938 has 24 divisors (see below), whose sum is σ = 42428100. Its totient is φ = 6467904.

The previous prime is 19492933. The next prime is 19492961. The reversal of 19492938 is 83929491.

It can be written as a sum of positive squares in 2 ways, for example, as 19421649 + 71289 = 4407^2 + 267^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19492893 and 19492902.

It is not an unprimeable number, because it can be changed into a prime (19492933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1758 + ... + 6486.

Almost surely, 2^19492938 is an apocalyptic number.

19492938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19492938 is an abundant number, since it is smaller than the sum of its proper divisors (22935162).

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

19492938 is a wasteful number, since it uses less digits than its factorization.

19492938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966 (or 4963 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 19492938 is about 4415.0807467135. The cubic root of 19492938 is about 269.1281341619.

The spelling of 19492938 in words is "nineteen million, four hundred ninety-two thousand, nine hundred thirty-eight".