19931374 has 4 divisors (see below), whose sum is σ = 29897064. Its totient is φ = 9965686.

The previous prime is 19931369. The next prime is 19931383. The reversal of 19931374 is 47313991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47313991 = 157 ⋅301363.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982842 + ... + 4982845.

It is an arithmetic number, because the mean of its divisors is an integer number (7474266).

Almost surely, 2^19931374 is an apocalyptic number.

19931374 is a deficient number, since it is larger than the sum of its proper divisors (9965690).

19931374 is an equidigital number, since it uses as much as digits as its factorization.

19931374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9965689.

The product of its digits is 20412, while the sum is 37.

The square root of 19931374 is about 4464.4567418668. The cubic root of 19931374 is about 271.1309398414.

It can be divided in two parts, 199 and 31374, that multiplied together give a palindrome (6243426).

The spelling of 19931374 in words is "nineteen million, nine hundred thirty-one thousand, three hundred seventy-four".