19730642 has 24 divisors (see below), whose sum is σ = 32788476. Its totient is φ = 8873216.

The previous prime is 19730609. The next prime is 19730671. The reversal of 19730642 is 24603791.

It can be written as a sum of positive squares in 2 ways, for example, as 19704721 + 25921 = 4439^2 + 161^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19730599 and 19730608.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17438 + ... + 18534.

Almost surely, 2^19730642 is an apocalyptic number.

19730642 is a deficient number, since it is larger than the sum of its proper divisors (13057834).

19730642 is a wasteful number, since it uses less digits than its factorization.

19730642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 19730642 is about 4441.9187295582. The cubic root of 19730642 is about 270.2176662689.

The spelling of 19730642 in words is "nineteen million, seven hundred thirty thousand, six hundred forty-two".