19490931 has 6 divisors (see below), whose sum is σ = 28153580. Its totient is φ = 12993948.

The previous prime is 19490923. The next prime is 19490957. The reversal of 19490931 is 13909491.

It is not a de Polignac number, because 19490931 - 2³ = 19490923 is a prime.

It is a super-2 number, since 2×19490931² = 759792782493522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19490431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1082821 + ... + 1082838.

Almost surely, 2^19490931 is an apocalyptic number.

19490931 is a deficient number, since it is larger than the sum of its proper divisors (8662649).

19490931 is a wasteful number, since it uses less digits than its factorization.

19490931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165665 (or 2165662 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 19490931 is about 4414.8534517014. The cubic root of 19490931 is about 269.1188973347.

It can be divided in two parts, 194 and 90931, that added together give a cube (91125 = 45³).

The spelling of 19490931 in words is "nineteen million, four hundred ninety thousand, nine hundred thirty-one".