19742330 has 32 divisors (see below), whose sum is σ = 38707200. Its totient is φ = 7221312.

The previous prime is 19742299. The next prime is 19742347. The reversal of 19742330 is 3324791.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 19742293 and 19742302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3719 + ... + 7301.

It is an arithmetic number, because the mean of its divisors is an integer number (1209600).

Almost surely, 2^19742330 is an apocalyptic number.

19742330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19742330 is a deficient number, since it is larger than the sum of its proper divisors (18964870).

19742330 is a wasteful number, since it uses less digits than its factorization.

19742330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 19742330 is about 4443.2341824396. The cubic root of 19742330 is about 270.2710127448.

The spelling of 19742330 in words is "nineteen million, seven hundred forty-two thousand, three hundred thirty".