19938734 has 4 divisors (see below), whose sum is σ = 29908104. Its totient is φ = 9969366.

The previous prime is 19938727. The next prime is 19938757. The reversal of 19938734 is 43783991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43783991 = 523 ⋅83717.

It is a super-2 number, since 2×19938734² = 795106227045512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984682 + ... + 4984685.

It is an arithmetic number, because the mean of its divisors is an integer number (7477026).

Almost surely, 2^19938734 is an apocalyptic number.

19938734 is a deficient number, since it is larger than the sum of its proper divisors (9969370).

19938734 is an equidigital number, since it uses as much as digits as its factorization.

19938734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9969369.

The product of its digits is 163296, while the sum is 44.

The square root of 19938734 is about 4465.2809542066. The cubic root of 19938734 is about 271.1643089766.

The spelling of 19938734 in words is "nineteen million, nine hundred thirty-eight thousand, seven hundred thirty-four".