19474749 has 36 divisors (see below), whose sum is σ = 33653984. Its totient is φ = 11024424.

The previous prime is 19474739. The next prime is 19474757. The reversal of 19474749 is 94747491.

It is not a de Polignac number, because 19474749 - 2⁵ = 19474717 is a prime.

It is a super-2 number, since 2×19474749² = 758531697226002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19474729) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 181954 + ... + 182060.

Almost surely, 2^19474749 is an apocalyptic number.

It is an amenable number.

19474749 is a deficient number, since it is larger than the sum of its proper divisors (14179235).

19474749 is an frugal number, since it uses more digits than its factorization.

19474749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 117 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 19474749 is about 4413.0203942425. The cubic root of 19474749 is about 269.0443996492.

The spelling of 19474749 in words is "nineteen million, four hundred seventy-four thousand, seven hundred forty-nine".